Radiation Dose Comparison between Micro-dose X-ray and Digital Radiography on Patients with Adolescent Idiopathic Scoliosis
Invited conference paper presented and published in conference proceedings


摘要Introduction: Patients with adolescent idiopathic scoliosis (AIS) expose to ionising radiation from their routine X-ray. To achieve the ALARA (as low as reasonably achievable) principle, a slot-scanning X-ray technique has been adopted and radiation dose using micro-dose protocol was compared with standard digital radiography (DR) on AIS.

Methods: A total of 99 volunteers with AIS underwent micro-dose X-ray and 33 underwent standard DR for full spine
imaging. Entrance skin dose was measured on posterior-anterior orientation at sternal notch, nipple line, and symphysis pubis. Effective dose and organ dose were simulated by PCXMC 2.0. Image quality was assessed by 2 raters using Cobb’s angle measurement and a set of imaging parameters. Radiation parameters were compared using independent-samples test.

Results: Entrance skin dose from micro-dose X-ray was 5.9 to 27.0 times lower at various regions compared with standard DR. The mean (± standard deviation) calculated effective dose was 2.6 ± 0.5 (μSv) and 67.5 ± 23.3 (μSv) from micro-dose and standard DR, respectively. Organ doses at thyroid, lung, and gonad regions were significantly lower in micro-dose (p<0.001). Within-groups comparison in different genders indicated that females received significantly higher organ dose at ovaries compared to the testes in males (p<0.001). There was no significant difference in overall rating of imaging quality between the 2 modalities.

Conclusion: Entrance skin dose, effective dose, and organ dose were significantly reduced using micro-dose protocol. The effective dose of a single micro-dose X-ray (2.6 μSv) was less than a day of background radiation. Micro-dose protocol also provided enough quality to perform consistent measurement in Cobb’s angle.
著者S. C. N. Hui, J. P. Pialasse, J. Wong, T. P. Lam, J. C. Y. Cheng and W. C. W. Chu
會議名稱The 36th Annual Congress of the Hong Kong Orthopaedic Association (HKOA)
會議地點Hong Kong

上次更新時間 2018-22-01 於 09:15