Radiation dose optimization for the bolus tracking technique in abdominal computed tomography: usefulness of real-time iterative reconstruction for monitoring scan

2016 ◽  
Vol 10 (2) ◽  
pp. 155-160 ◽  
Author(s):  
Yuya Ishikawa ◽  
Atsushi Urikura ◽  
Tsukasa Yoshida ◽  
Keisuke Takiguchi ◽  
Yoshihiro Nakaya
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Real Time ◽  
Iterative Reconstruction ◽  
Dose Optimization ◽  
Bolus Tracking ◽  
Tracking Technique ◽  
Abdominal Computed Tomography ◽  
Radiation Dose Optimization

Chest Computed Tomography Radiation Dose Optimization

2016 ◽  
Vol 31 (1) ◽  
pp. 23-28
Author(s):  
Elodie Gyssels ◽  
Pascale Bohy ◽  
Arnaud Cornil ◽  
Alain van Muylem ◽  
Nigel Howarth ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Dose Optimization ◽  
Chest Computed Tomography ◽  
Radiation Dose Optimization

scholarly journals Radiation dose optimization in pediatric temporal bone computed tomography: influence of tube tension on image contrast and image quality

2011 ◽  
Vol 54 (3) ◽  
pp. 247-254 ◽  
Author(s):  
Claude Bertrand Nauer ◽  
Christoph Zubler ◽  
Christian Weisstanner ◽  
Christof Stieger ◽  
Pascal Senn ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Radiation Dose ◽  
Temporal Bone ◽  
Image Contrast ◽  
Dose Optimization ◽  
Radiation Dose Optimization

Radiation Dose Optimization and Thoracic Computed Tomography

2014 ◽  
Vol 52 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Sarabjeet Singh ◽  
Mannudeep K. Kalra ◽  
Ranish Deedar Ali Khawaja ◽  
Atul Padole ◽  
Sarvenaz Pourjabbar ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Dose Optimization ◽  
Thoracic Computed Tomography ◽  
Radiation Dose Optimization

scholarly journals Low Radiation Dose Implications in Obese Abdominal Computed Tomography Imaging

2021 ◽  
Vol 11 (6) ◽  
pp. 2456
Author(s):  
Abdulaziz A. Qurashi ◽  
Louise A. Rainford ◽  
Fahad H. Alhazmi ◽  
Khalid M. Alshamrani ◽  
Abdelmoneim Sulieman ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Noise Reduction ◽  
Effective Dose ◽  
Iterative Reconstruction ◽  
Multidetector Ct ◽  
Obese Patients ◽  
Organ Doses ◽  
Low Radiation Dose ◽  
Abdominal Computed Tomography

The aim of this study was to evaluate the implications of low radiation dose in abdominal computed tomography (CT) when combined with noise reduction filters and to see if this approach can overcome the challenges that arise while scanning obese patients. Anthropomorphic phantoms layered with and without 3-cm-thick circumferential animal fat packs to simulate different sized patients were scanned using a 128-slice multidetector CT (MDCT) scanner. Abdominal protocols (n = 12) were applied using various tube currents (150, 200, 250, and 300 mA) and tube voltages (100, 120, and 140 kVp). MOSFET dosimeters measured the internal organ dose. All images were reconstructed with filtered back projection (FBP) and different iterative reconstruction (IR) strengths (SAFIRE 3, SAFIRE 4, and SAFIRE 5) techniques and objective noise was measured within three regions of interests (ROIs) at the level of L4–L5. Organ doses varied from 0.34–56.2 mGy; the colon received the highest doses for both phantom sizes. Compared to the normal-weighted phantom, the obese phantom was associated with an approximately 20% decrease in effective dose. The 100 kVp procedure resulted in a 40% lower effective dose (p < 0.05) compared to at 120 kVp and the associated noise increase was improved by increasing the IR (5) use, which resulted in a 60% noise reduction compared to when using FBP (p < 0.05). When combined with iterative reconstruction, the low-kVp approach is feasible for obese patients in order to optimize radiation dose and maintain objective image quality.

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