ECRIInstitute gives CT scanner purchasing advice while explaining that 128-slice units are in demand. ECRI: Interest rising for 128-slice CT scanners Auction Alert - Premier Medical Depot existing16 slice CT scanner in room 1680 Level 1, with a modern technology 64 slice CT scanner (with 128 slice reconstruction capability) and associated enabling works. 2. Issues with the Current CT scanner 2.1. Equipment Age and Reliability 2.1.1. The JR 16 slice CT scanner (CT2) was installed 13 years ago. It is 3 Go to the image at scan location S80 in the Series 1, Helical scans. 4. Select Measure in the tools and select a circular ROI. Increase the size of the ROI to about 1000 mm2 and position it in the center of the phantom image. (See Image below 5. Record both the Mean CT Number and the standard deviation from the ROI into the QA data sheet. 6. การตรวจเส้นเลือดหัวใจด้วยCT SCAN 128 SLICE ใช้เวลาไม่นาน เวลาที่เครื่อง scan ทำงาน 9วินาที เท่านั้น แต่อาจใช้เวลาเตรียมตัว 30 นาที -1ชั่วโมง แพทย์หัวใจจะ Helpingpatients save money on medical imaging services and book quicker CT Scan appointments at diagnostic centres in Canary Wharf, East London and multiple other centres across the UK. For self refer patients we provide a free telephonic consultation with a GP before and after the scan. 128 Slice CT scan for £570 Comparedwith 16-slice and 64-slice CT, 128-slice CT has more detectors, which means larger volume coverage and shorter scan times. First-generation 64-slice dual-source CT (DSCT) is an advanced scanner for coronary CT angiography with a heart rate independent high temporal resolution of 83 ms. IncisiveCT scanner design. The Incisive CT scanner has a bore size of 72cm and a detector array with a 50cm scan field of view. It is available in two configurations, one with a 4cm-wide detector and another with a 2cm-wide detector. It comes with 32, 64 and 128-slice configurations. The scanner incorporates advanced technologies in imaging free breathing” CT to accommodate the most challenging patients; high temporal resolution acquired by the scanner is highly important to freeze patient motion, e.g. in lung exams or in patients who cannot hold their (2 x 64) 64 w/128 channels AS20, AS40, AS64 slice confi guration: 32 w/64 channels, AS+ 128 slice confi guration . Computed Tomography, or CT, refers to computerized imaging procedures where an x-ray beam is aimed towards the patient and rotated around the body, in order to create cross-sectional images of the body. The word “tomography” is derived from Greek for, “tomos” meaning section or slice and “graphe” meaning drawing. In referring to CT scanners, the word “slice” is often mentioned, but does it refer to? The term slice refers to the number of rows of detectors in the z-axis of a CT. For example, in an 8-slice CT, there are eight slices of data captured for each rotation of the gantry. The first CT scanners offered single slice CT SSCT images but now there are multiple-slice CT scanners MSCT. The limitation with using a SSCT was that the thinner slices requiring high image-quality were not achievable unless the region to be scanned was very restricted, leading to low-quality images. A solution to this issue was to utilize the x-ray beam, incorporating multiple rows of detectors, thereby collecting more than one slice at a time and reducing the number of rotations needed. This method also led to the development of MSCT technology. The primary difference in the hardware between the two methods is the design of the detector arrays. SSCT detector arrays are one dimensional, consisting of high numbers of detector elements in a single row, whereas the MSCT allows for each individual element to be divided into several smaller detector elements creating a 2-dimensional array. As seen in the image, as opposed to a singular row of detectors along the fan beam, there are multiple rows of detectors. The first scanner with more than one row of detectors was introduced by Elscint in 1992 and was called the CT-Twin. This scanner allowed data for 2 slices to be shown simultaneously; this addressed x-ray heating problems, and significantly reduced scanning time. Eventually, the first “modern” versions of MSCT scanners were developed and introduced in 1998 and simultaneously acquired 4 slices, which meant four detector rows corresponding to four data channels. In 2002, the first MSCT scanners providing16 slices were introduced. In the current market, the commonly available CT slice counts include 16, 32, 40, 64, and 128 slices, with less common ones providing up to 256 and 320 slice CT scanners. The 4 to 8 slice scanners are slowly being withdrawn from the market. When patients are put through the CT, the circular opening rotates to take a series of x-rays with each rotation taking approximately 1 second. Multiple slice CT scanners initially could take four separate images through each rotation, but technology has improved to the level that CT scanners can now take between 6 to 128 separate images in a singular rotation, meaning that it takes significantly less time to complete a CT scan. Different slice-counts for CT scans can be useful for many different scenarios. The majority of CT scanners can perform general imaging procedures, to include chest and head exams as well as multiple different body views to scan for any fractures. However, for cardiac procedures, higher slice counts are required to ensure optimum image quality. Multi-slice CT scanners have numerous advantages such as superior image quality and this can enable earlier diagnostic results. This essentially leads to shortening the diagnostic time for the patient, enhancing the treatment, and improving the patients’ long-term outcome. Radiation dosage is always a major concern when getting a CT scan, and with the higher slice CT systems, there is the additional benefit of reducing this dose. With technologies such as automatic exposure control AEC and iterative reconstruction IR, a patient scanned on a higher slice CT will receive significantly lower doses of radiation than a patient on a lower dose CT scanner. MSCT can improve overall patient experience as well. CT scanning is an inherently unsettling experience and now with the ability to capture images faster with multiple slice scanners, patients are able to spend less time on the table, and the scanner puts the images into physicians’ hands faster. MSCT also allows large anatomic body ranges to be scanned producing thin and thick sleeves; thick slices are important for primary interpretation, and thin slices are important for reducing partial-volume streaks and allowing for high quality 3-dimensional reconstructions. In summary, the higher the slice count, the faster the speed of the scan; a conventional single-slice CT scanner may take up to ten minutes to complete a scan whereas multi-slice scanners are able to do the job within seconds. Shortening the time for scanning is especially useful for the treatment of children or others who may find it difficult to lie in one position for an extended period of time. 16-slice CT scanners are the ideal machines for higher-use facilities and for everyday use, particularly where reducing scan time is important. It is a good fit for Urgent Care Centers and hospitals alike. However, 32 and 64 slice CT scanners are becoming standard for imaging centers and hospitals; the accuracy and speed make them very suitable for hospitals with higher patient throughput. These higher slice CT scanners provide longer coverage per gantry rotation than the 16 slice scanners and reduce the likelihood of motion artifacts, which can cause blurring or double images in scans. The BodyTom Elite from Neurologica, a subsidiary of Samsung Electronics, is the world’s first mobile, full-body, 32-slice CT scanner, which incorporates the higher CT slice count as well as the portable aspect which allows for transporting the machine right to the patient’s bedsides for any procedures, as opposed to the traditional method of transporting patients to the radiology room. With the two combined, systems like this can save facilities valuable time and money. In conclusion, there are many advantages to the multiple slice CT scanners over the single slice scanners; these machines can increase the diagnostic capabilities of the scan, resulting in clearer images for the medical professionals, a diminished exposure of radiation for the patients, and better long-term outcomes. Multiple slice CT scanners will continue to evolve and grow as they have become a primary diagnostic imaging tool. Lower Dose, Remarkably Open Design. SCENARIA View 128 is a powerful premium performance CT solution that provides dependable routine application capabilities with available advanced clinical modules for Interventional CT, extended coverage Shuttle Scanning for Perfusion Exams, Cardiac CTA and Dual Energy examinations. The View employs 64 discrete detector and electronics channels over a 40mm detector coverage and reconstructs up to 128-slices per scan rotation. Unique and clinically valuable capabilities of the View include Fujifilm’s Next Generation Vision Model based Iterative Reconstruction capability “Intelli IPV” that can provide dose reduction up to 83% at the same image quality*. A wider 80cm gantry aperture, a more powerful 84kW generator provides up to 700mA operation. The advantages of the standard Auto Lateral Shift Table enables ±10cm lateral shift 20cm total shift range providing easier and more accurate positioning of the patient’s anatomy of interest at the scan Field of View’s iso-center where spatial resolution is better than off-center. HiMAR Plus metal artifact reduction minimizes objectionable metal induced artifacts. The View includes XR-25 Dose-Check control and is XR-29 Smart-Dose Compliant, while providing FDA 510k Cleared Indication for use for Low-Dose CT lung Cancer Screening. Features Lateral Shift Table, ± 10cm. IntelliCenter Auto-Lateral Shift Table is the only standard table that can shift up to ± 10cm laterally 20cm total range to Assist patient positioning Reduce dose* Improve spatial resolution Multi-Bowtie Filters. Multi-Bowtie filter size selection, based on anatomy to be imaged, reduces radiation dose* in areas outside the filter’s field of view. When used together with the auto lateral shift table, off-center anatomy can be brought to iso-center and the smallest bow-tie filter utilized. Intelli EC Plus. Fujifilm’s proprietary 3D mA modulation technology, Intelli EC, automatically modulates mA to lower individual patient dose levels depending on patient anatomy and size and considering the level of iterative reconstruction selected. Intelli EC Plus can be set to provide real-time control of mA, to achieve a constant Noise Standard-Deviation in the resulting images. Higher Data Sampling Rate. SCENARIA View’s higher data sampling rate provides faster anatomic coverage without sacrificing image quality and reduces motion artifacts. Wide 80cm Gantry Aperture. A more open 80cm gantry aperture spaciously accommodates the most challenging patients. 550 lbs. Table Weight Capacity. Higher standard weight capacity to accommodate larger patients up to 250 kg 550 lbs.. Reduced Dose for Cardiac CTA. ECG Dose Modulation reduces mA during the cardiac phases of a retrospectively gated exam that are not intended for image reconstruction. IPV – Iterative Reconstruction. IPV is Fujifilm’s Next-generation “vision modeled” iterative processing that provides dose reduction and overcomes a conventional IR weakness by IPV maintaining normal image texture that better matches the image texture appearance of Filtered Back Projection FBP. Utilizing IPV vs. conventional FBP reconstruction can provide* Dose reduction up to 83% at the same image quality low contrast detectability Image noise reduction up to 90% at the same dose Noise reduction rate control according to the IPV level used Low contrast detectability improvement by up to 100% at the same dose Natural image texture appearance the shape of noise power spectrum similar to that of FBP, even if using higher IPV strength level Reduced kV. Four settings support lower kV and dose based on individual patient size. Lower kV provides lower dose for small and pediatric patients. 80kV 100kV 120kV 140kV Axial Snap-Shot Imaging. Pulses the X-ray “on” only during a phase of the cardiac cycle using prospectively gated step-and-shoot cardiac scanning – reducing radiation dose. Dose Reporting and Awareness. SCENARIA View provides both DICOM Dose Structured Report and a Simple Dose Report to satisfy the full range of your IT and physician reading dose reporting needs. And, SCENARIA View includes Dose Check, compliant with NEMA XR-25, to monitor for exam doses that may exceed notice or alert levels. *In clinical practice, the use of Intelli IPV may reduce CT patient dose depending on the clinical task, patient size, anatomical location, and clinical practice. Image noise is defined as the standard deviation of pixel values within an area. A consultation with a radiologist and a physicist should be made to determine the appropriate dose to obtain diagnostic image quality for the particular clinical task. Low contrast detectability LCD and/or image noise were assessed using reference factory protocols comparing Intelli IPV and FBP. The LCD measured in mm slices and tested using the MITA CT IQ Phantom CCT189, The Phantom Laboratory, using model observer method. Technology Simple Dose Report DICOM Dose Structured Report SR CT Dose Check NEMA XR-25 NEMA Smart Dose Compliant XR-29 Focus Edition Innovative Focus Edition advantages. Continuing Fujifilm’s commitment to innovative healthcare, the SCENARIA View Focus Edition CT platform is uniquely designed with performance advantages to better meet the needs of a wide range of patients and providers. The Focus Edition is an outstanding CT for Radiology, Cardiology and Emergency Departments as well as outpatient locations. It leverages Fujifilm’s more powerful “Focus Engine” image processor and operator console, resulting in valuable benefits beyond our standard SCENARIA View CT Platform 20% faster workflow, for more patient exams per day UI update to the Synapse 3D Viewer on the Operator’s Console Tilted gantry helical scanning feature for faster workflow and improved MPR capability Higher level of cardiac CTA capability with “Cardio StillShot” 3D motion correction optional Cardio StillShot The SCENARIA View Focus Edition’s optional Cardio StillShot software is revolutionary, with a proprietary algorithm that creates clear, high-quality images for even the most challenging heart rates. 28 msec effective temporal resolution at sec gantry rotation speed versus 175 msec native temporal resolution without Cardio StillShot – a 6-fold improvement to freeze cardiac motion Motion correction for the coronary arteries, entire heart and the valves Enables more exams to be performed with Prospective Gating versus Retrospective Gating due to lower patient radiation exposure Enhanced Technologies The Focus Edition’s enhanced clinical performance is driven by numerous technological advances that Fujifilm has refined to create an outstanding CT System, including Intelli IPV – Vision Modeled Iterative Reconstruction HiVision Detector HiMAR Plus – Metal Artifact Reduction Cardio StillShot 3D Motion Correction optional Advanced 3D Visualization Capabilities Customer Stories Customer Stories Fujifilm helps West Feliciana Hospital provide quality health care their local families need. With new imaging equipment, they were able to recruit specialists and incorporate additional diagnostic offerings into their care services. West Feliciana Hospital St. Francisville, LA The Scenaria View CT scanner is advantageous for Massac Memorial Hospital’s rural community. It can accommodate a larger number of patient types with its high weight limit and wide bore, while the lateral shift feature … Massac Memorial Hospital Metropolis, IL West Feliciana Hospital is a small and unique Critical Access Hospital that recently purchased two key pieces of imaging equipment from Fujifilm to help provide the best care possible to their community. Hear what they … West Feliciana Hospital St. Francisville, LA Brochures SCENARIA View Product Brochure. SCENARIA View Product Specifications. SCENARIA View Product Brochure. Experience enhanced workflow speed and clear CT image quality across a wide range of applications using 64 slice acquisition and up to 128 slice reconstruction. Access the latest dose awareness, reduction and management features.* Benefit from more open patient access, a compact footprint, new energy efficient technologies and lower cost of ownership with Fujifilm’s SCENARIA View. *In clinical use, dose saving features may reduce CT patient dose depending on the clinical task, patient size, anatomical location and clinical practices employed. Consultation with a radiologist and physicist are recommended to determine the appropriate dose needed to obtain diagnostic image quality for a particular clinical task. Download the Brochure SCENARIA View Product Specifications. Continuing Fujifilm’s commitment to Innovating Healthcare, the SCENARIA View CT platform is designed with unique practical innovations to better meet the needs of a wide range of patients and providers. Download the Brochure Product Images Click the Images to open in lightbox Contact Us Let us help you find the right product or service that will suit your needs. Contact Us By simultaneously scanning several slices of the body, the scan time can be reduced significantly and the smallest details can be scanned within practicable scan times. Multislice CT enables a wide range of clinical applications from 3D to perfusion imaging to CT fluoroscopy. Our systems range from cost-effective 32- slice configurations to outstanding image quality 64- and 128-slice this information help you?Subscribe to news from Siemens Healthineers USA Be the first to know about our events, training, and news Press Release11 December 2013Surat Siemens installs SOMATOM Perspective 128 slice CT scanner at SRL Diagnostics-Speedscans, Surat First installation of 128 slice CT scanner in Surat. Improved patient safety with innovative low radiation dose features. Improved patient comfort with faster scans, reduced breath hold and Moodlight. Allows routine imaging and advanced clinical applications for Trauma, Cardiac and Neurovascular. Siemens Healthcare Sector installed SOMATOM Perspective CT Scanner at SRL Diagnostics-Speedscans, which is the first installation of a 128 slice CT scanner in Surat. The city of Surat, famous for its textile market, is witnessing increasing occurrences of lifestyle diseases. Timely and accurate diagnosis thus becomes a significant step towards choosing the mode of treatment. With Siemens’ SOMATOM Perspective, SRL Diagnostics-Speedscans is identifying and diagnosing the most challenging diseases and clinical conditions being faced by people of Surat today. SOMATOM Perspective is a single source 128 slice CT scanner that integrates innovative technologies designed to cover routine imaging to advanced applications in Trauma, Cardiac and Neurovascular imaging. Sanjay David, Business Head-CT Scanners, Siemens Healthcare India, elaborates, "Siemens has always been on the forefront of introducing innovative CT scanners in India. SOMATOM Perspective is another such example. At Siemens, we believe in the principle of ALARA As Low As Reasonably Achievable, in dealing responsibly with X-ray based computed tomography, so there are a host of low dose features available in this scanner to ensure the same." Dr. Uday M Surana, Consultant Radiologist and Center Head, SRL Diagnostics-Speedscans, explains, "With SOMATOM Perspective, we are increasingly scanning patients with family history of cardiac/lifestyle diseases, who do not show any symptoms of these ailments. In such cases, the scanner has been supporting us in providing necessary details that help us counsel patients appropriately. Low dose features, ergonomics like wide bore, Moodlight, etc. increase patient safety and comfort."The 70 centimeter wide bore of the scanner increases patient comfort, especially in scanning obese and trauma patients. The ergonomic design ensures easy access for interventions like CT guided biopsy. The addition of Moodlight on the side of the scanner promotes a sense of well being and provides a source of relaxation for children and anxious patients. This 128 slice scanner has a unique low dose feature called SAFIRE Sinogram Affirmed Iterative Reconstruction, which is also the world’s first raw-data based iterative reconstruction that helps achieve dose reduction of up to 60% for all organs and all types of patients obese, children or old patients. Other features like Ultra Fast Ceramics UFC, Care Dose4D and CARE Bolus ensure high quality scans at lowest radiation. The increased number of slices enables scanning of up to 50 centimeters in 5 seconds at an ultrahigh resolution. This means that the time the patient holds his breath during the scan is very low. This is especially useful for very sick and elderly patients. Rapid full-body trauma imaging is possible without compromising on the image quality. Overall, a faster scan translates to speedy diagnosis and shorter waiting time for patients and the rising trend in lifestyle diseases, Cardiac CT has shown significant benefit in the work-up of patients with high risk of cardiac diseases. Cardiac CT also plays a major role in the follow-up of patients who have undergone cardiac procedures. SOMATOM Perspective’s 128 slice configuration has been designed to perform Cardiac CT imaging. Designed to be energy efficient, this 128 slice CT scanner has significantly reduced power consumption and contributes to energy more information on SOMATOM Perspective please visit Contact PR20190910199en HITACHI SCENARIA View 128 SliceScenic modern volume CT SCENARIA is Hitachi's 128 slice CT scanner which paves the way for the future. The whole body scanner with a rotation speed which reduces kinetic artefact, examination time and contrast volume for vascular exploration dosage, while maintaining excellent diagnostic 750mm aperture maximises patients’ comfort, reduces anxiety and stress, and enables effortless examinations. Advanced Features & Technology SpecificationsMinimum scan time sec whole body scanningMaximum field of view 500mmup to 2880 view/s high-speed data acquisitionGantry aperture of 75cmNumber of slices 128X-ray tube MHUGenerator 72/84*kW *not available in countries requiring CE markFeaturesDose reduction achieved by lateral table movement, bow-tie filter, Automatic Exposure Control Intelli EC and new Interactive Processing Intelli IP advanced16cm lateral table movement for dose reduction and increased patient comfortAutomatic patient positioning head/body modeBreath demo light for patient preparationTouch vision panel system, allowing scan guidance in 10 languages as well as paediatric assistanceStraight forward patient registration and easy system handlingPreventive examination supported by fatPointer or riskPointerIntegrated image viewing stationCoronary analysis and calcium scoring Packages Cruising Eye View CEV-CPR, with virtual endoscopyPerfusion stroke analysisPredict scan contrast agent-triggeringInterventional procedure package Guide ShotHyper Q-net image viewingfatPointer analysis softwareriskPointer analysis softwareReal-time MPRComplete 3D reconstruction packageAutomatic bone removalVirtual colonoscopy with Shape Analysis FilerLung analysis nodule detectionCardiac scanning ECG trigger, retrospective/prospective mode Clinical Images Request a quote Today, the number of people with chronic conditions such as diabetes, renal disease, stroke, high blood pressure and coronary artery disease has been increasing due to our changed way of life and stress. The latest studies by the World health organization have show that coronary artery disease is a leading cause of death. One third of population dies because of this condition, especially in underdeveloped countries, including Thailand . The main factors in coronary artery disease are the narrowing and blockage of the arteries by plaque, which consists of cholesterol and calcium. The main risk factors include diabetes, high blood pressure, high cholesterol, stress and cigarette smoking. To diagnose coronary artery disease, doctors will evaluate patient's risk factors and perform some tests and then will divide patients suspected to be at risk into two groups; high and low risk. After that, there are two main diagnostic procedures that will usually be performed; Conventional Coronary Angiography,CAG CAG, which accurately assesses the coronary arteries, is currently the diagnostic standard for clinical evaluation of known or suspected coronary artery disease, after which the patients can be immediately treated by Coronary Artery Bypass Graft CABG or placement of a stent. Although complications rarely happen, the following may occur; hematoma at the site of the arterial puncture, coronary dissection and air embolus because in this procedure, a then plastic tube is inserted into an artery in the leg and advanced through the body into the coronary arteries. It is also an expensive procedure, and the patient needs, to stay in hospital for about 4-6 hours. Cardiovascular Examination by 128-Slice CT “Ordinary” computerized X-Rays 16-slice CT were not as accurate in demonstrating coronary artery problems, because the heart, unlike other structure, is moving and beating inside the chest. However today, with the advent of the most advanced form of this imaging, the multi-slice detectors and high powered computer programs call the 128-Slice CT , in around 4 seconds; we can efficiently get information on the coronary anatomical features in as few beats as possible, with 90% accuracy. The CT has various advantages. It helps doctors to make the diagnosis of certain diseases faster, more easily, and potentially more accurately. Furthermore, after this procedure, the patients do not have to stay in hospital. The 128-Slice CT is now a well known procedure leading to diagnosis of all diseases related to arteries or vessels. Those who should have a cardiovascular check up include Those with the following risk factors for heart diseases; High Cholesterol - Diabetes Smoking - Family history of heart disease Those suspected of being at high risk of narrowed coronary arteries; Suffering from chest pain - Having an abnormal Stress Test Those having had the following treatment due to coronary artery disease; Insertion of stents - Coronary artery bypass graft surgery CABG There are certain groups who are not suitable for CT scanning using contrast agents as it may cause sever allergy and acute renal failure; Severe asthmatics Heart failure Renal disease with high creatinine or chronic renal failure A history of allergy to sea food and/ or contrast agents High speed 128-Slice CT for other parts of body examination To diagnose cardiovascular disease through narrowed vessels To diagnose blockages in arteries/ vessels all over the body such as heart, brain, kidney, extremities, etc. To diagnose pre-cancerous tumors in intestine and lungs To examine bone abnormalities To diagnose abnormality of brain issue To diagnose abnormality of abdominal tissue Others including diagnosis of abnormalities of blood vessels, such as aneurysm, and to measure abdominal fat, which is related to the quantity of calcium in arterial walls coronary calcification and to evaluate risk factors in the cardiovascular system. Amber Diagnostics has high quality refurbished and used 128 slice CT Scanners for sale at competitive prices Since 1994 Amber Diagnostics has offered quality refurbished and used 128 slice CT Scanners for sale. In our 25,000 square foot warehouse we offer end to end service for every preowned equipment we house. We have installed CT scan machines for urgent care facilities, outpatient departments, private practices, and major medical centers throughout the world. During your consultation, our equipment experts will discuss your department’s needs, budget, and space requirements. We will support you in every stage of the process; from site planning to shipping, installation and technical servicing. Keep your costs down and imaging capabilities high with Amber Diagnostics. WE Have Many Options Featured Equipment Revolutionizing healthcare with used cutting-edge imaging medical equipment. CAN’T FIND WHAT YOU ARE LOOKING FOR? Give us a call! 1-407-438-7847 Our equipment specialists are ready to help you. Our Equipment SpecialistsAre Ready To Help You At Amber Diagnostics our trained professionals have been refurbishing used imaging equipment since 1994. We are more than capable of handling all questions and services throughout the purchasing process including room planning, shipping, installation, and training. Our warranties and financing can be customized to fit your facility’s needs and budgets. Click here to receive a call from our experts. Evaluation and comparison of performance of low-dose 128-slice CT scanner with different mAs values A phantom study Shilpa Singh et al. J Carcinog. 2021. Free PMC article Abstract Objective Radiation dose in computed tomography CT has been the concern of physicists ever since the introduction of CT scan. The objective of this study was to evaluate the performance of low-dose 128-slice CT scanner with different mAs values. Materials and methods Quantitative study was carried out at different values of mAs. Philips brilliance CT phantom with Philips ingenuity 128-slice low-dose CT scanner was chosen for this study. CT number linearity, CT number accuracy, slice thickness accuracy, high-contrast resolution, and low-contrast resolution were calculated and estimated computed tomography dose index volume CTDIvol for all the mAs values were recorded. Noise was calculated for all mAs values for comparison. Results Data analysis shows that image quality was acceptable for all protocols. High-contrast resolution for all protocols was 20 line pairs per centimeter. Low-contrast resolution for 50 mAs images was 4 mm and 3 mm for other mAs protocols. Images acquired using 100 mAs revealed ring artifacts. CTDIvol using 50 mAs was 33% of the CTDIvol using 150 mAs. The dose-length product at 100 mAs was reduced to 66% of the dose-length product at 150 mAs, and the same at 50 mAs was reduced to 33%. Conclusion It is evident here that mAs has direct impact on the radiation dose to patient. With iDose4, mAs can be reduced to 50 mAs in multislice low-dose CT scan to reduce the radiation dose with minimal effect on image quality for slice thickness 4 mm. However, noise would dominate at tube current lower than 50 mAs for 120 kVp. Keywords Computed tomography dose optimization; fourth-generation iterative reconstruction; image quality; low-dose computed tomography. Copyright © 2021 Journal of Carcinogenesis. Figures Figure 1 Schematic diagram of the Philips Brilliance Phantom used for the study Figure 2 Computed tomography numbers recorded for all mAs values to calculate computed tomography number uniformity Figure 3 Images to calibrate high-contrast resolution and low-contrast resolution Figure 4 Graphical representation of the relationship between mAs ad computed tomography dose index volume Similar articles Technical Note Increased photon starvation artifacts at low helical pitch in ultra-low-dose CT. Browne JE, Bruesewitz MR, Vrieze TJ, McCollough CH, Yu L. Browne JE, et al. Med Phys. 2019 Dec;46125538-5543. doi Epub 2019 Oct 21. Med Phys. 2019. PMID 31580485 Technical Note Evaluation of a 160-mm/256-row CT scanner for whole-heart quantitative myocardial perfusion imaging. So A, Imai Y, Nett B, Jackson J, Nett L, Hsieh J, Wisenberg G, Teefy P, Yadegari A, Islam A, Lee TY. So A, et al. Med Phys. 2016 Aug;4384821. doi Med Phys. 2016. PMID 27487900 Relationships of clinical protocols and reconstruction kernels with image quality and radiation dose in a 128-slice CT scanner study with an anthropomorphic and water phantom. Paul J, Krauss B, Banckwitz R, Maentele W, Bauer RW, Vogl TJ. Paul J, et al. Eur J Radiol. 2012 May;815e699-703. doi Epub 2011 Feb 12. Eur J Radiol. 2012. PMID 21316888 Performance evaluation of an 85-cm-bore X-ray computed tomography scanner designed for radiation oncology and comparison with current diagnostic CT scanners. Garcia-Ramirez JL, Mutic S, Dempsey JF, Low DA, Purdy JA. Garcia-Ramirez JL, et al. Int J Radiat Oncol Biol Phys. 2002 Mar 15;5241123-31. doi Int J Radiat Oncol Biol Phys. 2002. PMID 11958910 Pediatric Computed Tomography Dose Optimization Strategies A Literature Review. Al Mahrooqi KMS, Ng CKC, Sun Z. Al Mahrooqi KMS, et al. J Med Imaging Radiat Sci. 2015 Jun;462241-249. doi J Med Imaging Radiat Sci. 2015. PMID 31052099 Review. 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