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. References Verdun FR, Racine D, Ott JG, Tapiovaara MJ, Toroi P, Bochud FO, et al. Image quality in CT From physical measurements to model observers. Phys Med. 2015;31823–43. - PubMed Kroft LJ, van der Velden L, Girón IH, Roelofs JJ, de Roos A, Geleijns J. Added value of ultra-low-dose computed tomography, dose equivalent to chest X-ray radiography, for diagnosing chest pathology. J Thorac Imaging. 2019;34179–86. - PMC - PubMed Michael MG. Tradeoffs in CT image quality and dose. Med Phys. 2006;331–8. - PubMed Yang Q, Yan P, Zhang Y, Yu H, Shi Y, Mou X, et al. Low-dose CT image denoising using a generative adversarial network with wasserstein distance and perceptual loss. IEEE Trans Med Imaging. 2018;371348–57. - PMC - PubMed Greffier J, Macri F, Larbi A, Fernandez A, Khasanova E, Pereira F, et al. Dose reduction with iterative reconstruction Optimization of CT protocols in clinical practice. Diagn Interv Imaging. 2015;96477–86. - PubMed LinkOut - more resources Full Text Sources Europe PubMed Central PubMed Central
NeuViz128 brings the remarkable clarity and precision to CT imaging. Features: The modern outlook and humanized design offer best experience to both patients and doctors. Exclusive Quad-sampling and Micro-Star detector enable high resolution images with 1024x1024 matrix. High resolution imaging chain with unique iHD (isotropic High Definition
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
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128 slice ct scan