Reducing the Radiation Dose for CT Colonography Using Adaptive Statistical Iterative Reconstruction: A Pilot Study

Abstract

The results of this pilot study show that the radiation dose during CTC can be reduced 50% below currently accepted low-dose techniques without significantly affecting image quality when ASIR is used. Further evaluation in a larger patient group is warranted.

Radiation Dose Reduction in CT-Guided Spine Biopsies Does Not Reduce Diagnostic Yield

“…These include iterative reconstruction models such as adaptive statistical iterative reconstruction and model-based iterative reconstruction. [9][10][11][12][13][14][32][33][34][35][36][37][38][39][40] Although these imaging algorithms provide an additional method for dose reduction in CT-guided procedures, their availability is currently limited to newer CT scanners for routine diagnostic CT imaging. The greater availability of the iterative reconstruction software over time may allow for increased operator comfort when evaluating low-dose images during CT-guided procedures, potentially further reducing the radiation dose.…”

“…Pediatric patients and patients who receive multiple scans for acute disease follow-up, chronic conditions, and screening purposes often undergo CT with modified scanning protocols to reduce dose. [9][10][11][12][13][14] This type of protocol modification has also been used in CT-guided interventions to limit radiation dose when performing multiple scans during the procedure. 8,[15][16][17][18] Given the increased desire to reduce radiation dose to patients, we transitioned our protocols for CT-guided spine biopsies to use a lower dose.…”

A qualitative and quantitative analysis of radiation dose and image quality of computed tomography images using adaptive statistical iterative reconstruction

“…A previous study of colonography (4) using ASIR and a radiation dose half of the routinely used level concluded that image quality did not deteriorate significantly when compared to that obtained with FBP alone. Vorona et al (5) reported a 37% dose reduction at 40% ASIR with acceptable image quality for a pediatric abdominal CT. Another study (6) at low X‐ray tube voltage and high X‐ray tube current showed that noise was significantly reduced using low‐dose ASIR and that the CNR was improved for some anatomical organs (the aorta and pancreas) but remained unchanged for other organs (the liver).…”

Screening for colorectal cancer: what fits best?

“…Additional resources Review Lee, Leen, O'Morain & McNamara will have to be deployed for further evaluation of these findings, which may involve exposing asymptomatic subjects to invasive procedures such as tissue sampling, thereby having an overall impact on patient safety, patient anxiety and cost-effectiveness [79]. There are also safety concerns regarding radiation with the use of CTC but the amount of ionizing radiation used in CTC, is considered to be low and would be further minimized with the development of a low-dose regimen [ 80].…”