Focused CT n CTscan renalpelvis oralI V contrast
- Slides: 36
Focused CT n 即CT只scan renal以下到pelvis 範圍,配合oral和I. V. contrast。 優:減少病人radiation dose,尤 其小孩子。 l 缺:在此paper上,其study的結果, 只發現 7%病人有finding。 l
結論 n 整個abdomen和pelvis CT scan 都是必須的。因為可能因upper abd pain而間接影響到RLQ pain。
Use of C. M. (oral&rectal)而不做 enhanced CT 優:即有些病人只喝C. M. ,初步 的unenhanced CT即有lesion時, 則可不須再做enhanced CT。 n 缺:病人作第一次unenhanced CT沒有發現finding時,則須加做 一次enhanced CT,會增加病人 exposure dose和可能會delay診 斷。 n
Case 1 Acute appendicitis. Axial CT scans obtained with intravenous contrast material in a 27 -year-old woman show a minimally distended appendix with an enhancing wall (arrow). Stranding is seen in the periappendiceal fat. These findings are pathognomonic for acute appendicitis.
Case Report
case 1: acute suppurative appendicitis CT:unenhanced
case 1: acute suppurative appendicitis CT:enhanced 可以見到appendix wall變厚。
case 2: acute suppurative appendicitis(rupture) CT:unenhanced A-colon很脹,且appendix 旁有骯髒的液體存在。
case 2: acute suppurative appendicitis(rupture)CT: unenhanced R/O有rupture。存在著不明的air。
case 2: acute suppurative appendicitis(rupture)CT: enhanced Appendix wall 變厚。 R/O rupture
Case 3:appendicolith 一般而言,若有appendicolith,則appendicitis機率大大提升。
Case 4: R/O appendicitis or entercolitis 臨床也是先考慮OP
Csae 5:Acute appendicitis CT:unenhanced 未能很清楚show出lesion。
Csae 5:Acute appendicitis CT:enhanced 可以明顯show出 cecum 也有發炎現象,而且appendix wall整個enhance很強且變厚,旁邊也有fat stranding。
Case 6 為 27歲女性acute appendicitis。可以明顯見到appendix wall 有enhancement,且有發炎滲出液;相對看起來bladder wall 也有發炎的滲出液出現。
Case 7 47歲男性,在periappendiceal因有appendix發炎或破裂, 造成有髒東西滲到psoas muscle,有abscess形成(箭頭 處)。
Case 9:非appendicitis 41歲男性,有cecal diverticulitis,其cecal wall厚, 有憩室產生,而其appendix為正常(arrowhead)。
Proposed algorithm for interpretation of appendicitis CT in symptomatic patients interpretation CT findings recommendation Excludes appendicitis < 6 -mm appendix or > 6 -mm appendix completely gas-filled Work up causes of RLQ pain Possible appendicitis 6 - to 10 -mm appendix without any other CT signs Observation if symptomatic Probable appendicitis 6 - to 10 -mm appendix + WT + WHE(no FS) Surgery if symptomatic Definite appendicitis > 10 -mm appendix or 6 - to 10 -mm appendix + WT + WHE + FS Surgery if symptomatic WT=wall thickening WHE=wall hyperenhancement FS=fat stranding
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