rectums

PET scans were taken at rest and after inflation of a balloon placed in the subjects' rectums .
PET于休息时患者直肠放置的汽球膨胀时进行扫描。
Authorities say the inmates had inserted the phones into their rectums and were using them to direct criminal activity outside the prison.
当局说，犯人将电话插入他们的直肠，他们将利用电话命令在监狱外的犯罪活动。