A GPU‐accelerated framework for individualized estimation of organ dose in digital tomosynthesis

2021 ◽  
Author(s):  
Shobhit Sharma ◽  
Anuj Kapadia ◽  
J. Brown ◽  
W. Paul Segars ◽  
W. Bolch ◽  
...  
Keyword(s):  
Organ Dose ◽  
Digital Tomosynthesis

scholarly journals Sensitivity of Thoracic Digital Tomosynthesis (DTS) for the Identification of Lung Nodules

2015 ◽  
Vol 29 (1) ◽  
pp. 141-147 ◽  
Author(s):  
Steve G. Langer ◽  
Brian D. Graner ◽  
Beth A. Schueler ◽  
Kenneth A. Fetterly ◽  
James M. Kofler ◽  
...  
Keyword(s):  
Lung Nodules ◽  
Digital Tomosynthesis

DIGITAL TOMOSYNTHESIS FOR PATIENT SETUP VERIFICATION IN HADRONTHERAPY: A FEASIBILITY STUDY

2009 ◽  
Vol 92 ◽  
pp. S62
Author(s):  
M. Riboldi ◽  
M. Catalano ◽  
G. Baroni ◽  
M. Ciocca ◽  
S. Rossi ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Digital Tomosynthesis ◽  
Setup Verification ◽  
Patient Setup

scholarly journals Evaluation of Organ Dose and Image Quality Metrics of Pediatric CT Chest-Abdomen-Pelvis (CAP) Examination: An Anthropomorphic Phantom Study

2021 ◽  
Vol 11 (5) ◽  
pp. 2047
Author(s):  
Nor Azura Muhammad ◽  
Zunaide Kayun ◽  
Hasyma Abu Hassan ◽  
Jeannie Hsiu Ding Wong ◽  
Kwan Hoong Ng ◽  
...  
Keyword(s):  
Image Quality ◽  
Multidetector Ct ◽  
Organ Dose ◽  
Quality Metrics ◽  
Ct Scanner ◽  
Image Quality Metrics ◽  
Tube Current ◽  
Significant Difference ◽  
Noise Ratio ◽  
The Impact

The aim of this study is to investigate the impact of CT acquisition parameter setting on organ dose and its influence on image quality metrics in pediatric phantom during CT examination. The study was performed on 64-slice multidetector CT scanner (MDCT) Siemens Definition AS (Siemens Sector Healthcare, Forchheim, Germany) using various CT CAP protocols (P1–P9). Tube potential for P1, P2, and P3 protocols were fixed at 100 kVp while P4, P5, and P6 were fixed at 80 kVp with used of various reference noise values. P7, P8, and P9 were the modification of P1 with changes on slice collimation, pitch factor, and tube current modulation (TCM), respectively. TLD-100 chips were inserted into the phantom slab number 7, 9, 10, 12, 13, and 14 to represent thyroid, lung, liver, stomach, gonads, and skin, respectively. The image quality metrics, signal to noise ratio (SNR) and contrast to noise ratio (CNR) values were obtained from the CT console. As a result, this study indicates a potential reduction in the absorbed dose up to 20% to 50% along with reducing tube voltage, tube current, and increasing the slice collimation. There is no significant difference (p > 0.05) observed between the protocols and image metrics.

Role of digital tomosynthesis in the context of tuberculosis contact investigation: comparisons with digital radiography

2021 ◽  
pp. 028418512110224
Author(s):  
Jeongha Mok ◽  
Jeong A Yeom ◽  
Su Won Nam ◽  
Jun Mi Yoo ◽  
Ji Won Lee ◽  
...  
Keyword(s):  
Digital Radiography ◽  
Low Dose ◽  
Close Contact ◽  
Correct Diagnosis ◽  
Lower Sensitivity ◽  
Digital Tomosynthesis ◽  
Reference Standard ◽  
Contact Investigation ◽  
Screening Study ◽  
Low Dose Computed Tomography

Background Chest radiography value as a screening tool in those exposed to pulmonary tuberculosis (TB) is reduced by its lower sensitivity to detect small intrapulmonary lesions. Purpose To evaluate the efficacy of digital tomosynthesis (DTS) screening of individuals that had contacted persons with active TB using low-dose computed tomography (CT) as the reference standard methods. Material and Methods This retrospective, community-based screening study of 90 adults who had been in close contact with a TB case was undertaken at our institution. All individuals underwent clinical evaluation, digital radiography (DR), DTS, and low-dose chest CT. Observers assessed and classified DR and DTS images using CT as the reference-standard method. Based on clinical and imaging findings, TB status was classified as normal, latent, minimal, subclinical, and active. Diagnostic performances of DTS and DR for the interpretation of correct diagnosis were calculated. Results The estimated effective doses for DR, DTS, and low-dose CT were 0.01 mSv, 0.1 mSv, and 0.33 mSv, respectively. TB statuses of the 90 individuals were as follows: 62 latent (68.9%); two subclinical (2.2%); and one minimal (1.1%). The sensitivities, specificities, and accuracies of DTS and DR in the interpretation of correct diagnosis were 75.8%, 100%, 91.1% and 48.5%, 96.5%, 78.9%, respectively. Conclusion DTS appears to be superior to DR for the detection of lung lesions in individuals with TB contacts. DTS can offer a reasonable option for TB contact investigation.

Organ Dose Estimates for Hyperthyroid Patients Treated with 131I: An Update of the Thyrotoxicosis Follow-Up Study

2015 ◽  
Vol 184 (6) ◽  
pp. 595 ◽  
Author(s):  
Dunstana R. Melo ◽  
Aaron B. Brill ◽  
Pat Zanzonico ◽  
Paolo Vicini ◽  
Brian Moroz ◽  
...  
Keyword(s):  
Organ Dose ◽  
Follow Up Study ◽  
Hyperthyroid Patients
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