ISSN 1004-4140
CN 11-3017/P
| Citation: |
JI W C, TIAN W L, LIU W Y, et al. Application of the Canon 320 Row Variable Helical Pitch CTA System Combined with Iterative Reconstruction Technology for Lower Limb Vascular Imaging[J]. CT Theory and Applications, 2025, 34(1): 149-154. DOI: 10.15953/j.ctta.2024.009. (in Chinese).
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Objectives: To investigate the image quality obtained using the Canon 320 row variable helical pitch (vHP) computed tomography (CT) system combined with iterative reconstruction technology for lower limb angiography and the radiation exposure to patients. Methods: From March 2023 to June 2023, we enrolled 40 patients who were treated at our hospital for suspected arterial vascular disease of the lower limbs. The patients, who all underwent CT angiography of the lower limb arteries, were divided into two groups (A and B; 20 patients/group) through double-blind random grouping. Both groups were treated with 370 mg/mL of the contrast agent iodoparol at a tube voltage of 120 kV. A dual-cylinder high-pressure syringe was used to inject 90 mL of the contrast agent into the median elbow vein at a flow rate of 5 mL/s. The scanning range extended from the level of the abdominal aorta to the toe. For Group A, the Canon 320 row vHP system was used, with a large pitch from the abdominal aorta to the popliteal fossa and a small pitch from the popliteal fossa to the tip of the heel. The images were reconstructed using iterative reconstruction technology. For Group B, conventional pitch technology was used for full scanning and the Filtered BackProjection method for image reconstruction. The subjective image quality, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), CT value, effective radiation exposure, and contrast medium iodine intake at four measuring points of the abdominal aorta and common iliac, upper femoral, and popliteal arteries were compared between the two groups. The t-test was used to compare the objective evaluation index, effective radiation exposure, and contrast agent iodine intake values between the two groups, whereas the Mann-Whitney U test was used to compare the subjective scores. Results: There were no significant differences between the two groups in terms of objectively evaluated image quality, SNR, and CNR of the abdominal aorta and common iliac, upper femoral, and popliteal arteries. Group A had significantly higher vascular CT values than Group B. Moreover, the patients in Group A were significantly less exposed to radiation (9.18±0.36) mGy than those in Group B were (18.1±0.00) mGy. Conclusion: The Canon 320 row vHP system combined with iterative reconstruction technology ensured good image quality and significantly reduced patient exposure to radiation, thereby improving the safety of CTA, and can be widely used in clinical practice.
| [1] |
李春晨, 周慧, 尹小花, 等. 基于KARL迭代重建技术联合双低剂量在下肢CTA检查中的应用[J]. 医学影像学杂志, 2020, 30(10): 1908-1911.
LI C C, ZHOU H, YIN X H, et al. The application of KARL simultaneous iterative reconstruction technique with double low doses in the CTA examination of lower limbs[J]. Journal of Medical Imaging, 2020, 30(10): 1908-1911. (in Chinese).
|
| [2] |
郝永, 王淑梅, 刘冲, 等. 多排螺旋CT下肢CTA多种重建方式对下肢动脉阻塞性疾病临床诊断价值的研究[J]. 临床和实验医学杂志, 2020, 19(13): 1445-1448. DOI: 10.3969/j.issn.1671-4695.2020.13.030.
HAO Y, WANG S M, LIU C, et al. Diagnostic value comparison of different lower limb CTA multiple reconstruction methods of multi-slice spiral CT in patients with low-er limb arterial obstructive disease[J]. Journal of Clinical and Experimental Medicine, 2020, 19(13): 1445-1448. DOI: 10.3969/j.issn.1671-4695.2020.13.030. (in Chinese).
|
| [3] |
蒋严, 郭苗苗, 刁楠, 等. 双低技术联合基于原始数据的迭代重建在下肢动脉CT血管成像中的应用[J]. 实用放射学杂志, 2019, 35(4): 638-642. DOI: 10.3969/j.issn.1002-1671.2019.04.031.
JIANG Y, GUO M M, DIAO N, et al. The study of lower extremity CT angiography by low radiation dose and lowcontrast medium with sinogram-affirmed iterative reconstruction[J]. Journal of Practical Radiology, 2019, 35(4): 638-642. DOI: 10.3969/j.issn.1002-1671.2019.04.031. (in Chinese).
|
| [4] |
文峥, 李晚君, 吴伟清, 等. CT血管造影(CTA)诊断下肢动脉硬化闭塞症的临床价值[J]. 影像研究与医学应用, 2021, 5(9): 117-118. DOI: 10.3969/j.issn.2096-3807.2021.09.056.
|
| [5] |
王力, 苏雪娟, 陈体, 等. MRA及CTA诊断糖尿病足下肢血管病变的临床价值比较[J]. 中国CT和MRI杂志, 2020, 18(4): 145-147.
WANG L, SU X J, CHEN T, et al. Comparison of clinical value of MRA and CTA in diagnosis of lower extremity vascular disease of diabetic foot[J]. Chinese Journal of CT and MRI, 2020, 18(4): 145-147. (in Chinese).
|
| [6] |
赵艺涵, 韩丹, 韦文彦, 等. 70kV双球管模式下肢CT血管成像检查: 与单源模式随机对照研究[J]. 重庆医科大学学报, 2019, 44(10): 1342-1346.
ZHAO Y H, HAN D, WEI W Y, et al. A randomized controlled study of dual-source (70 kV) versus single-source (70 kV or 100 kV) CT angiography of the lower extremities[J]. Journal of Chongqing Medical University, 2019, 44(10): 1342-1346. (in Chinese).
|
| [7] |
CRIQUI M H, ABOYANS V. Epidemiology of peripheral artery disease[J]. Circulation Research, 2015, 116(9): 1509-1526. DOI: 10.1161/CIRCRESAHA.116.303849.
|
| [8] |
陈浩, 钟志林, 库雷志, 等. MSCT血管成像对下肢缺血性病变的筛查价值[J]. 医学影像学杂志, 2021, 31(5): 865-868.
CHEN H, ZHONG Z L, KU L Z, et al. The value of MSCT angiography in screening of lower limb ischemic lesions[J]. Journal of Medical Imaging, 2021, 31(5): 865-868. (in Chinese).
|
| [9] |
刘彬, 高思喆, 王传卓, 等. 低管电压联合全模型迭代重建技术在下肢动脉CTA中的应用[J]. 中国临床医学影像杂志, 2018, 29(9): 660-663.
LIU B, GAO S Z, WANG C Z, et al. Application of lower extremity CT angiography with low tube voltage and iterative model reconstruction[J]. Journal of China Clinic Medical Imaging, 2018, 29(9): 660-663. (in Chinese).
|
| [10] |
杨彦林, 吴国良, 田少勇, 等. CTA成像在下肢血管闭塞病变中的应用及与血管腔内疗效的关系[J]. 影像科学与光化学, 2022, 40(1): 89-93. DOI: 10.7517/issn.1674-0475.210703.
YANG Y L, WU G L, TIAN S Y, et al. Application of CTA in lower extremity vascular occlusion and its relationship with endovascular efficacy[J]. Imaging Science and Photochemistry, 2022, 40(1): 89-93. DOI: 10.7517/issn.1674-0475.210703. (in Chinese).
|
| [11] |
蒋宇婷, 张帆, 郭丹丹, 等. CT血管造影评估2型糖尿病及高血压下肢动脉斑块的对比研究[J]. 实用放射学杂志, 2021, 37(10): 1622-1625. DOI: 10.3969/j.issn.1002-1671.2021.10.012.
JIANG Y T, ZHANG F, GUO D D, et al. Comparative study of lower extremity arterial plaque between type 2 diabetes mellitus and hypertension patients using CT angiography[J]. Journal of Practical Radiology, 2021, 37(10): 1622-1625. DOI: 10.3969/j.issn.1002-1671.2021.10.012. (in Chinese).
|
| [12] |
张丁哲, 于小利. 大螺距和双能量肺灌注肺动脉成像的对比研究[J]. 临床放射学杂志, 2018, 37(3): 514-517.
ZHANG D Z, YU X L. Comparison of two pulmonary CTA protocols: High-pitch and dual energy CT[J]. Journal of Clinical Radiology, 2018, 37(3): 514-517. (in Chinese).
|
| [13] |
郑月月, 柳德学, 石小霞. 256层螺旋CT血管成像在2型糖尿病患者下肢血管病变诊断中的应用[J]. 中国CT和MRI杂志, 2021, 19(4): 174-176. DOI: 10.3969/j.issn.1672-5131.2021.04.053.
ZHENG Y Y, LIU D X, SHI X X. Application of 256-slice Spiral CT angiography in diagnosis of vascular lesions of lower limbs in patients with type 2 diabetes mellitus[J]. Chinese Journal of CT and MRI, 2021, 19(4): 174-176. DOI: 10.3969/j.issn.1672-5131.2021.04.053. (in Chinese).
|
| [14] |
LIU B, GAO S, CHANG Z, et al. Lower extremity CT angiography at 80 kVp using iterative model reconstruction[J]. Diagnostic and Interventional Imaging, 2018, 99(9): 561-568. DOI: 10.1016/j.diii.2018.04.006.
|
| [15] |
YUHUAN C, ZHENTANG L, MICHELLE L, et al. Reducing both radiation and contrast doses in coronary CT angiography in lean patients on a 16-cm wide-detector CT using 70 kVp and ASiR-V algorithm, in comparison with the conventional 100-kVp protocol[J]. European Radiology, 2020, 29(6): 3036-3043.
|
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