text: An imaging study which can help determine the diagnosis in cases of a deep non-palpable perirectal abscess includes a CT scan.
option_0: Perianal abscess CT
option_1: Perianal abscess MRI
option_2: Perianal abscess ultrasound
option_3: Anal fistula x ray
option_4: Anal fistula ultrasound
option_5: Anal fissure physical examination
option_6: Anal cancer CT
option_7: Anal cancer ultrasound