Algorithms that use iterative reconstruction to eliminate noise in images will have a “profound effect” on CT, according to Stanford radiology professor Dr. Geoffrey Rubin.
Algorithms that use iterative reconstruction to eliminate noise in images will have a “profound effect” on CT, according to Stanford radiology professor Dr. Geoffrey Rubin.
“Just about every aspect of image quality and patient safety relating to CT scanning will be impacted in a positive way by iterative reconstruction,” Rubin said.
By using photons more efficiently, iterative reconstruction (IR) algorithms will serve as enabling technologies for advances in image quality and patient safety, allowing radiologists to dial back the kilovoltage (kV) that drives x-ray tubes and the mAs (milliamperes) that define tube current. This can cut patient radiation dose by 50% or more. IR can also be used to better separate the differences in attenuation between calcium and iodine, allowing a reduction in the dose of contrast medium when performing contrast-enhanced CT.
Vendors have either released their own IR algorithms or are preparing to do so:
• GE's ASIR (adaptive statistical IR), commercially released at the end of 2008, is onboard about 350 CTs globally.
• Siemens' IRIS (IR in image space) began shipping commercially in February.
• Philips' iDose, now in beta testing, is scheduled for commercial release before the end of the year (the company is currently taking orders).
• Toshiba's IR algorithm is in FDA review.
Future algorithms that incorporate IR hold out the further prospect of scanning faster and with higher temporal resolution while maintaining image quality. GE is already working on a version of this technology, called MBIR (model-based IR), which is currently in testing at GE luminary sites and will be commercialized later this year outside the U.S. It will not take the place of ASIR, but rather be used on special cases.
Emerging Perspectives on PSMA PET Radiotracers: An Interview with Kenneth J. Pienta, MD
April 24th 2024In a recent interview, Kenneth J. Pienta, M.D., discussed the impact of piflufolastat F18, current directions in research with other PSMA-targeted radiotracers and future possibilities for the role of PSMA PET in the imaging paradigm for prostate cancer.
Study Reveals Benefits of Photon-Counting CT for Assessing Acute Pulmonary Embolism
April 23rd 2024In comparison to energy-integrating detector CT for the workup of suspected acute pulmonary embolism, the use of photon-counting detector CT reduced radiation dosing by 48 percent, according to newly published research.