2011年3月10日

X光判讀筆記

如何判斷一張Chest X-Ray是否照得好
  1. Penetration: Spine要在心臟後方隱約可見
  2. Inspiration: Diaphragm至少要在8-9 posterior rib以下
  3. Rotation: Spinous process到兩端Clavicle等距
  4. Angulation:  Apical lordotic view的話Clavicle會高於3rd rib
教學連結

辨識Abdomen內的Free air (Pneumoperitoneum)
有三個要注意的特徵:
  1. Air beneath the diaphragm (Supine or Left decubitus view)
  2. Falciform ligament sign
  3. Air on both sides of the bowel wall (Rigler's sign)
教學連結

辨識Pleural effusion
  1. CP angle blunting
  2. Meniscus sign
  3. Pleural effusions shift mediastinal structures away from the side opacified.
教學連結


辨識Bowel obstruction & ileus


姿勢:Supine position最好
Large bowel
  1. Peripheral
  2. Haustral markings don't extend across wall
Small bowel
  1. Central
  2. Valvulae extends across lumen
  3. Normal diameter= 2.5cm
  1. CP angle blunting
  2. Meniscus sign
  3. Pleural effusions shift mediastinal structures away from the side opacified.
辨別ileus/ obstruction
Ileus- Rectum, Sigmoid colon內還有空氣;Obstruction的話無
教學連結
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