Principles and applications of dual source CT

Schmidt, Bernhard; Flohr, Thomas

doi:10.1016/j.ejmp.2020.10.014

Cited by 43 publications

(49 citation statements)

References 54 publications

(55 reference statements)

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“…The key feature of the high‐pitch mode DSCT is its improved temporal resolution 26 . The third‐generation DSCT turbo FLASH mode temporal resolution can be up to 66 ms with the highest pitch of 3.2 and SFOV of Ø 35.4 cm, and it is suitable for conditions requiring high temporal resolution and no large SFOV, like cardiovascular CT imaging, 8,27–29 and nonobese patient or pediatrics imaging 1,30,31 .…”

Section: Discussionmentioning

confidence: 99%

The ultrafast, high‐pitch turbo FLASH mode of third‐generation dual‐source CT: Effect of different pitch and corresponding SFOV on image quality in a phantom study

Zhou

et al. 2021

J Applied Clin Med Phys

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Purpose To investigate the effect of different pitches and corresponding scan fields of view (SFOVs) on the image quality in the ultrafast, high‐pitch turbo FLASH mode of the third‐generation dual‐source CT using an anthropomorphic phantom. Methods The phantom was scanned using the ultrafast, high‐pitch turbo FLASH protocols of the third‐generation dual‐source CT with the different pitches and corresponding SFOVs (pitches: 1.55 to 3.2 with increments of 0.1, SFOVs: 50 cm to 35.4 cm). The objective parameters such as the CT number, image noises, signal‐to‐noise ratio (SNR), contrast‐to‐noise ratio (CNR), and artifacts index (AI), and image features from the head, chest, and abdomen were compared between the CT images with a pitch of 1.55 and SFOV of Ø 50 cm and a pitch of 3.2 and SFOV of Ø 35.4 cm. Then, the 18 series of CT images of the head, chest, and abdomen were evaluated by three radiologists independently. Results The differences in the CT numbers were not statically significant between the CT images with a pitch of 1.55 and SFOV of Ø 50 cm and a pitch of 3.2 and SFOV of Ø 35.4 cm from most body parts and potential combinations (p > 0.05), Most of the image noises and the AI from the images with the pitch of 1.55 were significantly lower than those with the pitch of 3.2 (p < 0.05), and the SNR and CNR from the images with the pitch of 1.55 were higher than those with the pitch of 3.2. There were significant differences in the first‐order features and texture features of the head (59.3%, 28.3%), chest (66%, 35.7%), and abdomen (71.6%, 64.7%) (p < 0.05). The subjective image quality was excellent when the pitch was less than 2.0 and gradually decreased with the increasing pitch. In addition, the image quality decreased significantly when the pitch was higher than 3.0 (all k≥0.69), especially in the head and chest. Conclusions In the ultrafast, high‐pitch turbo FLASH mode of the third‐generation DSCT, increasing the pitch and lowering the corresponding SFOV will change the image features and cause more artifacts degrading the image quality. Specific to the clinical needs, decreasing the pitch not only can expand the SFOV but also can improve the image quality.

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Section: Discussionmentioning

confidence: 99%

The ultrafast, high‐pitch turbo FLASH mode of third‐generation dual‐source CT: Effect of different pitch and corresponding SFOV on image quality in a phantom study

Zhou

et al. 2021

J Applied Clin Med Phys

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“…The biggest advantages of dual-source scanners are their extraordinarily high temporal resolution up to 66 ms when operating in single-energy mode [ 17 ] and their ability to independently modulate currents to reduce radiation doses and install filters in order to increase the energy separation of emitted photons [ 5 , 9 , 26 , 27 ]. The temporal resolution in dual-energy mode is not so extraordinary but is still high—125 ms [ 17 , 28 ].…”

Section: Types Of Dect Scanners From Different Manufacturersmentioning

confidence: 99%

“…The shift of tubes causes a minimal delay of registration data from the same location of both lamps, which can generate misregistration artifacts [ 29 , 30 ]. Moreover, scatter photons that originate in one tube can reach the detector of another and generate artifacts [ 27 , 29 ].…”

Section: Types Of Dect Scanners From Different Manufacturersmentioning

confidence: 99%

Dual-Energy Heart CT: Beyond Better Angiography—Review

Tarkowski

Czekajska−Chehab

2021

JCM

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“…The dual-source CT (DSCT) is a new technology developed based on 64-slice spiral CT. DSCT with two x-ray tubes and two detectors and the systems can work simultaneously ( 53 ). DSCT improves temporal resolution compared to single-source CT, which allows for imaging at higher heart rates.…”

Section: Current Clinically Available Ct Techniquesmentioning

confidence: 99%

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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Principles and applications of dual source CT

Cited by 43 publications

References 54 publications

The ultrafast, high‐pitch turbo FLASH mode of third‐generation dual‐source CT: Effect of different pitch and corresponding SFOV on image quality in a phantom study

The ultrafast, high‐pitch turbo FLASH mode of third‐generation dual‐source CT: Effect of different pitch and corresponding SFOV on image quality in a phantom study

Dual-Energy Heart CT: Beyond Better Angiography—Review

Advances in CT Techniques in Vascular Calcification

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