Dynamic perfusion CT parameters and delayed contrast washout CT in characterization of adrenal tumors: A comparative study

Mohammed, Ahmed R.; Ahmed, Ahmed Tohamy; Khalil, Tarek; Refaie, Huda

doi:10.1016/j.ejrnm.2017.03.003

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…Similar results were found by Deniffel et al 74 The third included study involved patients with adrenal tumors and revealed that BV parameter was able to characterize adenomas from non-adenomas. 70 Computed Tomography in Colon-rectal Cancer…”

Section: Computed Tomography In Pancreatic Cancermentioning

confidence: 99%

A Systematic Review on the Role of the Perfusion Computed Tomography in Abdominal Cancer

et al. 2021

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Background and purpose Perfusion Computed Tomography (CTp) is an imaging technique which allows quantitative and qualitative evaluation of tissue perfusion through dynamic CT acquisitions. Since CTp is still considered a research tool in the field of abdominal imaging, the aim of this work is to provide a systematic summary of the current literature on CTp in the abdominal region to clarify the role of this technique for abdominal cancer applications. Materials and Methods A systematic literature search of PubMed, Web of Science, and Scopus was performed to identify original articles involving the use of CTp for clinical applications in abdominal cancer since 2011. Studies were included if they reported original data on CTp and investigated the clinical applications of CTp in abdominal cancer. Results Fifty-seven studies were finally included in the study. Most of the included articles (33/57) dealt with CTp at the level of the liver, while a low number of studies investigated CTp for oncologic diseases involving UGI tract (8/57), pancreas (8/57), kidneys (3/57), and colon–rectum (5/57). Conclusions Our study revealed that CTp could be a valuable functional imaging tool in the field of abdominal oncology, particularly as a biomarker for monitoring the response to anti-tumoral treatment.

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Section: Computed Tomography In Pancreatic Cancermentioning

confidence: 99%

A Systematic Review on the Role of the Perfusion Computed Tomography in Abdominal Cancer

et al. 2021

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“…These factors are known to cause CT number variability, which can signi cantly affect the reliability of the resultant data [11]. Importantly, variability in the CT number can affect the sensitivity and speci city of lesion detection and characterisation which are based on the CT number threshold [12], such as adrenal and renal masses [13][14][15]. Furthermore, the calculated radiation dose for therapy may also be affected by CT number variability because dose calculation depends primarily on the CT number in obtaining mass density of lesion under treatment [16].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Vertical Off-Centring, Tube Voltage and Phantom Size on CT Numbers: An Experimental Study

Al-Hayek

Spuur

Davidson

et al. 2021

Preprint

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Objectives: This pilot experimental study explores the effect of vertical off-centring on CT numbers in combination with various tube voltages and phantom sizes.Methods: A CIRS Model 062 Electron Density and Combined Head and Body phantom underwent imaging using a Siemens Emotion 16-slice CT and GEMINI GXL scanners. Uniformity was evaluated as a function of vertical off-centring (20, 40, 60, and 80 mm above the gantry iso-centre) using different phantom sizes and tube voltage for ROI positions across the X and Y axis of each phantom. CT number change was assessed by comparing the measured values between anterior (upper) versus posterior (lower) ROIs.Results: The results showed that vertical off-centring and phantom size could account for 92% of the recorded variance and resultant CT number change. The uniformity test recorded a maximum change of 27.2 and 14 HU for peripheral ROIs at 80 mm phantom shift above the gantry iso-centre using the GEMINI GXL and Siemens scanners, respectively. The absolute CT number differences between anterior and posterior ROIs were 13.7 for the 30 cm phantom and 4.8 for the 20 cm phantom at 80 mm vertical off-centring. The most remarkable differences were observed at lower tube voltages.Conclusions: It is essential to highlight the significance of optimal patient centring for CT examinations and the consequences of CT numbers variation on clinical decision making. Phantom off-centring and ROI location have been demonstrated to affect CT number uniformity in this pilot experimental study. This was more evident at peripheral phantom areas, lower tube voltages and larger phantom size.

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The impacts of vertical off-centring, tube voltage, and phantom size on computed tomography numbers: An experimental study

Al-Hayek¹,

Spuur²,

Davidson³

et al. 2022

Radiography

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Dynamic perfusion CT parameters and delayed contrast washout CT in characterization of adrenal tumors: A comparative study

Cited by 3 publications

References 21 publications

A Systematic Review on the Role of the Perfusion Computed Tomography in Abdominal Cancer

A Systematic Review on the Role of the Perfusion Computed Tomography in Abdominal Cancer

The Impact of Vertical Off-Centring, Tube Voltage and Phantom Size on CT Numbers: An Experimental Study

The impacts of vertical off-centring, tube voltage, and phantom size on computed tomography numbers: An experimental study

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