RESUMEN
OBJECTIVE: To investigate the. METHODS: for locating and selecting the acupoints of "Taixi" (KI3), "Shuiquan" (KI5), "Fuliu" (KI7), "Jiaoxin" (KI8), "Zhubin" (KI9), and "Yingu" (KI10) and the morphological structure of these acupoints in rabbits. MethodsAccording to the WHO and national standards for human acupoints and rabbit X-ray images, acupoint locations were marked using the anatomical landmarks on body surface in 10 New Zealand rabbits. The acupoints were dissected to compare the homologous and analogous tissue between rabbits and human body and thus correct the locations of these acupoints. Potentials were measured for the 10 New Zealand rabbits at the corrected locations of the acupoints and around the acupoints, and the final locations of these acupoints were determined by comparing the anatomical results and the data of potentials. Anatomical observation was performed after marking, and the relationship between acupuncture needle and adjacent structure was observed. RESULTS: "Taixi" was located in the ankle area, at the midpoint between the prominence of the medial malleolus and the calca-neal tendon; "Shuiquan" was located in the calcaneal area below "Taixi" in the depression anterior to the calcaneal tuberosity; "Fuliu" was located at the medial side of the calf, at 2 cun above the prominence of the medial malleolus anterior to the calcaneal tendon; "Jiaoxin" was located at the medial side of the calf, at 2 cun above the prominence of the medial malleolus and in the depression posterior to the medial border of the tibia; "Zhubin" was located at the medial side of the calf, at 5 cun above the medial malleolus on the line between "Taixi" and "Yingu"; "Yingu" was located at the medial side of the knee, at the posterior-inferior border of the semitendinosus tendon on the popliteal crease. The results of skin potentials at the acupoints suggested that "Taixi", "Shuiquan", "Fuliu", and "Zhubin" were high-reliability acupoints, "Jiaoxin" was a medium-reliability acupoint, and "Yingu" was a low-reliability acupoint. CONCLUSION: Comparative anatomy combined with imaging, surface anatomy, and electrophysiological techniques of acupoints can help with the accurate localization and selection of acupoints in experimental animals, improve the reliability of acupoint location, and enrich the comparative anatomical data of acupoints.
RESUMEN
In this study we estimated a geometric correlation among digitally reconstructed radiographic image (DRRI), kV x-ray image (kVXI) from the On-Board Imager (OBI) and electric portal image (EPI). To verify geometric correspondence of DRRI, kVXI and EPI, specially designed phantom with indexed 6 ball bearings (BBs) were employed. After accurate setup of the phantom on a treatment couch using orthogonal EPIs, we acquired set of orthogonal kVXIs and EPIs then compared the absolute positions of the center of the BBs calculated at each phantom plane for kVXI and EPI respectively. We also checked matching result for obliquely incident beam (gantry angle of 315 degrees) after 2D-2D matching provided by OBI application. A reference EPI obtained after initial setup of the phantom was compared with 10 series of EPIs acquired after each 2D-2D matching. Imaginary setup errors were generated from -5 mm to 5 mm at each couch motion direction. Calculated positions of all center positions of the BBs at three different images were agreed with the actual points within a millimeter and each other. Calculated center positions of the BBs from the reference and obtained EPIs after 2D-2D matching agreed within a millimeter. We could tentatively conclude that the OBI system was mechanically quite reliable for image guided radiation therapy (IGRT) purpose.