位於上腹部的ᅳ些主要的臟器，如肝臟、胃、膜臟、脾臟、十二指腸、橫結腸，再加上左、右賢臟、腹主動脈、下腔靜脈與肝門靜脈等，是臨床醫學影像常見的重要結構。但對於醫事放射科系學生，乃至於臨床醫事放射師、及其他相關醫療從業ᄉ員,往往只能由固定的影像截取角度和位置，死記成燥的結果，卻無法從根本清楚建立結構觀念。本文以分析這些重要內臟的基本解剖位置，並說明彼此相對位置關係，再運用簡幾何圖形模擬，建立臟器間佈局的三度空間觀念。按此邏輯，不論是軸位取像，或是矢狀、冠狀影像，甚至於其他成像角度時，醫護ᄉ員對於結構在影像呈現的變化上，有更為專業判斷依據。

The upper Abdomen which conatins digestive tract, liver, pancrease, spleen, kidneys, and large bloods vessels is common in clinical medical images. It is very important that medical students and radiological technicians understood the medical images about this region. This article analyzes the basic dissection trend of these organs. Finally, we utilize the simple square and triangle simulation to establish three-dimensional layout of these organs. According to these conceptions, we can figure out the structure signs basically from the axial pictures, sagittal planes, or coronal sections.