A 55-year-old man presents with left lower quadrant (LLQ) abdominal pain of 2-day duration, associated with constipation. On physical examination, he has tenderness localized to the LLQ with fullness in that area leukocyte count is 22,000 and temperature is 101.5degF. Which would be the best diagnostic study to evaluate this man?
A
Diagnostic laparoscopy
B
Barium enema
C
Plain abdominal roentgenogram
D
Computed tomography (CT) of the abdomen/pelvis with orally (PO) and intravenous (IV) contrast