Optimization of Tube Current in Coronary Multidetector Computed Tomography Angiography

Hoang, Jenny K.; Hurwitz, Lynne M.; Boll, Daniel T.

doi:10.1097/rct.0b013e31818af37c

Cited by 8 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, reduction in radiations delivered during CCTA to the lowest acceptable dose should be a goal for every CT examination. In the past, several approaches have focused on reducing the effective radiation dose during CCTA examinations ( 16 , 17 , 18 , 19 ). Large trails have authenticated the use of BMI to adjust radiation dose by modulating tube voltage or current settings in CCTA ( 9 , 10 ).…”

Section: Discussionmentioning

confidence: 99%

“…Large trails have authenticated the use of BMI to adjust radiation dose by modulating tube voltage or current settings in CCTA ( 9 , 10 ). It has been reported that adaptation of tube current settings to BMI results in constant image noise and reduced radiation dose ( 10 , 16 ). However, adaptation of tube voltage is also important for reduction in radiation dose, as dose changes with the square of the tube voltage ( 17 , 18 ).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of a Chest Circumference-Adapted Protocol for Low-Dose 128-Slice Coronary CT Angiography with Prospective Electrocardiogram Triggering

Chen

Wang

et al. 2015

Korean J Radiol

View full text Add to dashboard Cite

ObjectiveTo assess the effect of chest circumference-adapted scanning protocol on radiation exposure and image quality in patients undergoing prospective electrocardiogram (ECG)-triggered coronary CT angiography (CCTA).Materials and MethodsOne hundred-eighty-five consecutive patients, who had undergone prospective ECG triggering CCTA with a 128-slice CT, were included in the present study. Nipple-level chest circumference, body weight and height were measured before CT examinations. Patients were divided into four groups based on kV/ref·mAs = 100/200, 100/250, 120/200, and 120/250, when patient's chest circumference was ≤ 85.0 (n = 56), 85.0-90.0 (n = 53), 90.0-95.0 (n = 44), and > 95.0 (n = 32), respectively. Image quality per-segment was independently assessed by two experienced observers. Image noise and attenuation were also measured. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated. The effective radiation dose was calculated using CT dose volume index and the dose-length product.ResultsA significant correlation was observed between patients' chest circumference and body mass index (r = 0.762, p < 0.001). Chest circumference ranged from 74 to 105 cm, and the mean effective radiation dose was 1.9-3.8 mSv. Diagnostic image quality was obtained in 98.5% (2440/2478) of all evaluated coronary segments without any significant differences among the four groups (p = 0.650). No significant difference in image noise was observed among the four groups (p = 0.439), thus supporting the validity of the chest circumference-adapted scanning protocol. However, vessel attenuation, SNR and CNR were significantly higher in the 100 kV groups than in the 120 kV groups (p < 0.05).ConclusionA measure of chest circumference can be used to adapt tube voltage and current for individualized radiation dose control, with resultant similar image noise and sustained diagnostic image quality.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Evaluation of a Chest Circumference-Adapted Protocol for Low-Dose 128-Slice Coronary CT Angiography with Prospective Electrocardiogram Triggering

Chen

Wang

et al. 2015

Korean J Radiol

View full text Add to dashboard Cite

show abstract

Reduced radiation dose and improved image quality at cardiovascular CT angiography by automated attenuation-based tube voltage selection: intra-individual comparison

et al. 2014

View full text Add to dashboard Cite

show abstract

Coronary CT angiography with low radiation dose

Zhang

2010

Int J Cardiovasc Imaging

View full text Add to dashboard Cite

With the introduction of 64-slice CT and dual-source CT technology, coronary CT angiography(CCTA) has emerged as a useful diagnostic imaging modality for the noninvasive assessment of coronary heart disease. Recently, the risks associated with ionizing radiation on CT have raised serious concerns.The main concern of exposure to ionizing radiation is the potential risk of cancer. CCTA involves much higher radiation dose with the advances in the spatial and temporal resolution of cardiac CT. Currently,various dose-saving algorithms, such as ECG (electrocardiography)-based dose modulation, reduced tube voltage, and prospective ECG gating, high-pitch helical scanning are available to lower radiation exposure during cardiac CT. Therefore, careful selection of CT scanning protocols is needed to keep the radiation exposure 'as low as reasonably achievable (ALARA)'. In this review we will discuss the radiation dose safety issues, the measurement of radiation dose and current use of dose-saving techniques in CCTA.

show abstract

Optimization of Tube Current in Coronary Multidetector Computed Tomography Angiography

Cited by 8 publications

References 22 publications

Evaluation of a Chest Circumference-Adapted Protocol for Low-Dose 128-Slice Coronary CT Angiography with Prospective Electrocardiogram Triggering

Evaluation of a Chest Circumference-Adapted Protocol for Low-Dose 128-Slice Coronary CT Angiography with Prospective Electrocardiogram Triggering

Reduced radiation dose and improved image quality at cardiovascular CT angiography by automated attenuation-based tube voltage selection: intra-individual comparison

Coronary CT angiography with low radiation dose

Contact Info

Product

Resources

About