|
|
|
| Predictive value of the positioning image in neck CT scans for clavicular artifacts of thyroid |
| HU Guang-zhu, ZHU Da-rong, HAN Zhi-jiang |
| Deaprtment of Radiology, Hangzhou First People’s Hospital, Hangzhou 310000, China |
|
|
|
|
Abstract Objective: To evaluate the predictive value of the positioning image in neck CT scans for clavicular artifacts of thyroid. Methods: A retrospective analysis of 211 cases of neck CT scaning data was performed to measure the size of the jaw-pharynx angle(the angle between the lower edge of the mandible and the postpharyngeal wall) and the number of vertebra (shoulder not be covered). SPSS 19 analysis software was used to analyze the degree of jaw-pharynx angle and the number of vertebra displayed in thyroid with or without clavicular artifacts, the thresholds of which would be predicted by the receiver operating characteristic(ROC) curve. Results: The degree of jaw-pharynx angle(t=5.63， P＜0.05) and the number of vertebra(t=12.29, P＜0.05) displayed in thyroid with or without clavicular artifacts were statistically different. The area under the ROC curve of the degree of jaw-pharynx angle and the number of vertebra for the predictive value of thyroid without clavicular artifacts were 0.744 and 0.873, respectively. With the increase of degree of jaw-pharynx angle and the number of vertebra, the sensitivity of prediction of thyroid without clavicular artifacts decreased, but the specificity increased. When the degree of the jaw-pharynx angle and the number of vertebra were 80.875° and 5.75 respectively, the Youden’s indexes were the maximum, which were 0.402 and 0.625 respectively. And at this time, the sensitivity and specificity of prediction of thyroid without clavicular artifacts were 64.1% and 76.1%, 82.1% and 80.4%, respectively. When the jaw-pharynx angle was no less than 80.875° and the number of vertebra was no less than 5.75, the incidence rate of thyroid without clavicular artifacts was 91.0%. When the jaw-pharynx angle was less than 80.875° and the number of vertebra was less than 5.75, thyroid without clavicular artifacts occurred at a rate of 14.3%. Conclusion: It is effective to evaluate the clavicular artifacts of thyroid by observativing the positioning image in the neck CT scanning about the degree of jaw-pharynx angle and the number of vertebra. And it can help to decrease the influence of clavicular artifacts for thyroid, and to improve the quality of images.
|
|
Received: 07 August 2017
|
|
|
|
|
|
[1]Hegedüs L. Clinical practice. The thyroid nodule[J]. N Engl J Med, 2004, 351(17): 1764-1771.
[2]Levine RA. Value of Doppler ultrasonography in management of patients with follicular thyroid biopsies[J]. Endocr Pract, 2006, 12(3): 270-274.
[3]De Nicola H, Szejnfeld J, Logullo AF, et al. Flow pattern and vascular resistive index as predictors of malignancy risk in thyroid follicular neoplasms[J]. J Ultrasound Med, 2005, 24(7): 897-904.
[4]Iared W, Shigueoka DC, Cristófoli JC, et al. Use of color Doppler ultrasonography for the prediction of malignancy in follicular thyroid neoplasms: systematic review and meta-analysis[J]. J Ultrasound Med, 2010, 29(3): 419-425.
[5]Frates MC, Benson CB, Charboneau JW, et al. Management of thyroid nodules detected at US: Society of Radiologists in Ultrasound consensus conference statement[J]. Radiology, 2005, 237(3): 794.
[6]Moon WJ, Jung SL, Lee JH, et al. Benign and malignant thyroid nodules: US differentiation—multicenter retrospective study[J]. Radiology, 2008, 247(3): 762.
[7]舒艳艳，陈文辉，韩志江，等. 甲状腺结节粗钙化的CT诊断和鉴别诊断[J]. 中国临床医学影像杂志，2013，24（12）：849-853.
[8]韩志江，项晶晶，包凌云，等. 甲状腺钙化性病变的超声和CT联合诊断[J]. 国际医学放射学杂志，2016，39（4）：416-421.
[9]张金美，韩志江. CT在评估甲状腺乳头状癌侧颈部淋巴结转移中的价值[J]. 实用医学影像杂志，2015，16（1）：5-8.
[10]黄雅元，包凌云，韩志江，等. CT和超声的联合应用在良性甲状腺环状钙化诊断中的价值[J]. 中国临床医学影像杂志，2014，25（6）：385-389.
[11]张军，耿道颖，张晓龙，等. 不同千伏设置对缺血性脑血管病头颈联合CTA图像质量的影响[J]. 中国医学影像技术，2009，25（3）：398-400.
[12]吕仁锋，吕亚囡，王拓，等. 不同体位对下颈部CT图像质量的影响[J]. 实用放射学杂志，2011，27（10）：1599-1600.
[13]唐俊军，吴元佐. 正常成人甲状腺的CT研究及临床意义[J]. 中国医学影像技术，2004，20（z2）：4-5. |
|
|
|
