Recent Advances in Computed Tomographic Technology

Tabari, Azadeh; Gullo, Roberto Lo; Murugan, Venkatesh A.; Otrakji, Alexi; Digumarthy, Subba R.; Kalra, Mannudeep K.

doi:10.1097/rti.0000000000000258

Cited by 42 publications

(19 citation statements)

References 80 publications

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“…Second, this study was done using 128-slice multi-detector CT scanners. Further studies using dual-energy CT scanners and higher multi-detector scanners such as 320-slice detectors are recommended [ 33 , 34 ]. Third, there was no correlation between the results of coronary CTA and conventional angiography.…”

Section: Limitations Of the Studymentioning

confidence: 99%

Inter-observer agreement of the Coronary Artery Disease Reporting and Data System (CAD-RADS<sup>TM</sup>) in patients with stable chest pain

Razek¹,

Elrakhawy²,

Youssef³

et al. 2018

Pol J Radiol

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PurposeTo assess inter-observer variability of the Coronary Artery Disease – Reporting and Data System (CAD-RADS) for classifying the degree of coronary artery stenosis in patients with stable chest pain.Material and methodsA prospective study was conducted upon 96 patients with coronary artery disease, who underwent coronary computed tomography angiography (CTA). The images were classified using the CAD-RAD system according to the degree of stenosis, the presence of a modifier: graft (G), stent (S), vulnerable plaque (V), or non-diagnostic (n) and the associated coronary anomalies, and non-coronary cardiac and extra-cardiac findings. Image analysis was performed by two reviewers. Inter-observer agreement was assessed.ResultsThere was excellent inter-observer agreement for CAD-RADS (k = 0.862), at 88.5%. There was excellent agreement for CAD-RADS 0 (k = 1.0), CAD-RADS 1 (k = 0.92), CAD-RADS 3 (k = 0.808), CAD-RADS 4 (k = 0.826), and CAD-RADS 5 (k = 0.833) and good agreement for CAD-RADS 2 (k = 0.76). There was excellent agreement for modifier G (k = 1.0) and modifier S (k = 1.0), good agreement for modifier N (k = 0.79), and moderate agreement for modifier V (k = 0.59). There was excellent agreement for associated coronary artery anomalies (k = 0.845), non-coronary cardiac findings (k = 0.857), and extra-cardiac findings (k = 0.81).ConclusionsThere is inter-observer agreement of CAD-RADS in categorising the degree of coronary arteries stenosis, and the modifier of the system and associated cardiac and extra-cardiac findings.

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Section: Limitations Of the Studymentioning

confidence: 99%

Inter-observer agreement of the Coronary Artery Disease Reporting and Data System (CAD-RADS<sup>TM</sup>) in patients with stable chest pain

Razek¹,

Elrakhawy²,

Youssef³

et al. 2018

Pol J Radiol

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“…A potential explanation for these findings is that lowering the CT tube voltage results in a greater photoelectric effect of iodinated contrast media, with only a slight increase in the noise because of improved tube current capabilities. Moreover, the advances in hardware equipped with Stellar detectors and software program in third-generation dual-source CT [ 30 , 31 ], which are supposed to be more sensitive to electron influx, are thus, dose-efficient and generate high quality images while using 80 kVp. A few studies that investigated DECT, showed that the radiation dose was comparable to the single energy 100–120 kVp CT [ 18 , 32 ].…”

Section: Discussionmentioning

confidence: 99%

Dual-source abdominopelvic computed tomography: Comparison of image quality and radiation dose of 80 kVp and 80/150 kVp with tin filter

Choi

Ahn

Pak³

et al. 2020

PLoS ONE

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Objective To compare the radiation dose and the objective and subjective image quality of 80 kVp and 80/150 kVp with tin filter (80/Sn150 kVp) computed tomography (CT) in oncology patients. Methods One-hundred-and-forty-five consecutive oncology patients who underwent third-generation dual-source dual-energy CT of the abdomen for evaluation of malignant visceral, peritoneal, extraperitoneal, and bone tumor were retrospectively recruited. Two radiologists independently reviewed each observation in 80 kVp CT and 80/Sn150 kVp CT. Modified line-density profile of the tumor and contrast-to-noise ratio (CNR) were measured. Diagnostic confidence, lesion conspicuity, and subjective image quality were calculated and compared between image sets. The effective dose and size-specific dose estimate (SSDE) were calculated in the image sets. Results Modified line-density profile analysis revealed higher attenuation differences between the tumor and normal tissue in 80 kVp CT than in 80/Sn150 kVp CT (127 vs. 107, P = 0.05). The 80 kVp CT showed increased CNR in the liver (8.0 vs. 7.6) and the aorta (18.9 vs. 16.3) than the 80/Sn150 kVp CT. The 80 kVp CT yielded higher enhancement of organs (4.9 ± 0.2 vs. 4.7 ± 0.4, P<0.001) and lesion conspicuity (4.9 ± 0.3 vs. 4.8 ± 0.5, P = 0.035) than the 80/ Sn150 kVp CT; overall image quality and confidence index were comparable. The effective dose was reduced by 45.2% with 80 kVp CT (2.3 mSv ± 0.9) compared to 80/Sn150 kVp CT

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“…CCTA has become increasingly common in clinical practice as an essential diagnostic component [15][16][17]. Particularly with CT angiographies, increasingly faster acquisition times require…”

Section: Discussionmentioning

confidence: 99%

More holes, more contrast? Comparing an 18-gauge non-fenestrated catheter with a 22-gauge fenestrated catheter for cardiac CT

et al. 2020

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Objective To compare the performance of an 18-gauge nonfenestrated catheter (18-NFC) with a 22gauge fenestrated catheter (22-FC) for cardiac CT angiography (CCTA) in patients with suspected coronary heart disease. Subjects and methods 74 consecutive patients imaged on a 2 nd generation dual-source CT with arterial phase CCTA were included in this retrospective investigation to either an 18-NFC or 22-FC. In comparison to the 18-NFC, the 22-FC has three additional perforations for contrast agent dispersal proximal to the tip. We examined the two groups for differences in their average attenuation in the right and left ventricles (RV, LV) and in the atrium (RA, LA) as well as in the proximal right coronary artery (RCA) and the left main coronary artery (LM). The averages were calculated for both the 18-NFC and 22-FC. Results Catheters were successfully placed on the first attempt 97% (36/37) for 18-NFC and 95% (35/37) for the 22-FC. The following enhancement levels were measured: 22-FC (in Hounsfield-Units (HU)

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Recent Advances in Computed Tomographic Technology

Cited by 42 publications

References 80 publications

Inter-observer agreement of the Coronary Artery Disease Reporting and Data System (CAD-RADS<sup>TM</sup>) in patients with stable chest pain

Inter-observer agreement of the Coronary Artery Disease Reporting and Data System (CAD-RADS<sup>TM</sup>) in patients with stable chest pain

Dual-source abdominopelvic computed tomography: Comparison of image quality and radiation dose of 80 kVp and 80/150 kVp with tin filter

More holes, more contrast? Comparing an 18-gauge non-fenestrated catheter with a 22-gauge fenestrated catheter for cardiac CT

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