Dual-energy CT and coronary imaging

Kay, Fernando Uliana

doi:10.21037/cdt.2020.04.04

Cited by 14 publications

(17 citation statements)

References 108 publications

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“…The gold filter eliminates high-energy photons from the beam generated with 120 kV kVp, while a zinc filter absorbs low-energy photons [ 31 ]. It is a cheaper solution then dual-source scanners because the only added hardware to standard scanner is sets of filters [ 24 ]. However, due to big delays in two energy registration data—the time of tube rotation with pitch = 1—this type of scanner has limited application in heart examination, which is confirmed by a lack of any publication in this field concerning this type of scanner.…”

Section: Types Of Dect Scanners From Different Manufacturersmentioning

confidence: 99%

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Dual-Energy Heart CT: Beyond Better Angiography—Review

Tarkowski

Czekajska−Chehab

2021

JCM

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Section: Types Of Dect Scanners From Different Manufacturersmentioning

confidence: 99%

“…For that reason, it is essential to assess the lumen of coronary arteries using multiple VMIs. Calcium subtraction is other method of increasing the accuracy of heavily calcified coronary arteries [ 24 , 34 , 35 ].…”

Section: Dect Implementation Heart Imagingmentioning

confidence: 99%

Dual-Energy Heart CT: Beyond Better Angiography—Review

Tarkowski

Czekajska−Chehab

2021

JCM

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“…DECT application technology ( 67 ) includes virtual monochromatic imaging (VMI) and virtual non-contrast (VNC) reconstruction. VMI is the synthetic image at a specific single energy level from two spectral x-ray projections, and VNC removes some imaging components ( 68 ). Using VMI to reduce the contrast agent dose is considered one of the most promising DECT applications ( 67 ).…”

Section: Current Clinically Available Ct Techniquesmentioning

confidence: 99%

“…Compared with using calcium score acquisition alone, the radiation dose was reduced, but the displayed calcification was smaller than the actual calcification ( 73 ). Therefore, further research is still needed to determine the specific deviation of the VNC from reality ( 68 ). In a phantom study, researchers used a plaque similar to human vascular calcification and demonstrated strong agreement between the calcium integration calculated by DECT and the conventional mono-energy CT ( 74 ).…”

Section: Current Clinically Available Ct Techniquesmentioning

confidence: 99%

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Advances in CT Techniques in Vascular Calcification

Zhang

Feng

et al. 2021

Front. Cardiovasc. Med.

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Vascular calcification, a common pathological phenomenon in atherosclerosis, diabetes, hypertension, and other diseases, increases the incidence and mortality of cardiovascular diseases. Therefore, the prevention and detection of vascular calcification play an important role. At present, various techniques have been applied to the analysis of vascular calcification, but clinical examination mainly depends on non-invasive and invasive imaging methods to detect and quantify. Computed tomography (CT), as a commonly used clinical examination method, can analyze vascular calcification. In recent years, with the development of technology, in addition to traditional CT, some emerging types of CT, such as dual-energy CT and micro CT, have emerged for vascular imaging and providing anatomical information for calcification. This review focuses on the latest application of various CT techniques in vascular calcification.

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High‐pitch, high temporal resolution, multi‐energy cardiac imaging on a dual‐source photon‐counting‐detector CT

et al. 2022

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To measure the accuracy of material decomposition using a dualsource photon-counting-detector (DS-PCD) CT operated in the high-pitch helical scanning mode and compare the results against dual-source energyintegrating-detector (DS-EID) CT, which requires use of a low-pitch value in dual-energy mode. Methods: A DS-PCD CT and a DS-EID CT were used to scan a cardiac motion phantom consisting of a 3-mm diameter iodine cylinder. Iodine maps were reconstructed using DS-PCD in high-pitch mode and DS-EID in low-pitch mode. Image-based circularity, diameter, and iodine concentration of the iodine cylinder were calculated and compared between the two scanners. With institutional review board approval, in vivo exams were performed with the DS-PCD CT in high-pitch mode. Images were qualitatively compared against patients with similar heart rates that were scanned with DS-EID CT in low-pitch dual-energy mode.Results: On iodine maps, the mean circularity was 0.97 ± 0.02 with DS-PCD in high-pitch mode and 0.95 ± 0.06 with DS-EID in low-pitch mode. The mean diameter was 2.9 ± 0.2 mm with DS-PCD and 3.1 ± 0.2 mm with DS-EID, both of which are close to the 3 mm ground truth. For DS-PCD, the mean iodine concentration was 9.6 ± 0.8 mg/ml and this was consistent with the 9.4 ± 0.6 mg/ml value obtained with the cardiac motion disabled. For DS-EID, the concentration was 12.7 ± 1.2 mg/ml with motion enabled and 11.7 ± 0.5 mg/ml disabled. The background noise in the iodine maps was 15.1 HU with DS-PCD and 14.4 HU with DS-EID, whereas the volume CT dose index (CTDI vol ) was 3 mGy with DS-PCD and 11 mGy with DS-EID. On comparison of six patients (three on PCD, three on EID) with similar heart rates, DS-PCD provided iodine maps with welldefined coronaries even at a high heart rate of 86 beats per minute. Meanwhile, there were substantial motion artifacts in iodine maps obtained with DS-EID for patients with similar heart rates. Conclusion:In a cardiac motion phantom, DS-PCD CT can perform accurate material decomposition in high-pitch mode, providing iodine maps with excellent geometric accuracy and robustness to motion at approximately 38% of the dose for similar noise as DS-EID CT.

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Dual-energy CT and coronary imaging

Cited by 14 publications

References 108 publications

Dual-Energy Heart CT: Beyond Better Angiography—Review

Dual-Energy Heart CT: Beyond Better Angiography—Review

Advances in CT Techniques in Vascular Calcification

High‐pitch, high temporal resolution, multi‐energy cardiac imaging on a dual‐source photon‐counting‐detector CT

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