美国芝加哥大学泌尿科医生Gerald Chodak认为,用一导针戴在食指尖端经直肠行前列腺针吸活检可准确地做出前列腺癌诊断,此方法痛苦少,不需麻醉及清洁洗肠。Chodak现已进行了200多例检查,与经会阴取活体比较,假阴性率由18％下降为3％。方法为经直肠触到前列腺后通过戴在手指连结导管上的22号针,沿弯曲的食指尖端刺入腺体,约 Gerald Chodak, a urologist at the University of Chicago in the United States, believes that the diagnosis of prostate cancer can be accurately made with a guide needle and a transrectal prostate needle aspiration biopsy. This method is less painful and requires no anesthesia and cleansing. Chodak has now performed more than 200 inspections, reducing the false-negative rate from 18% to 3% as compared to those who had perineal intakes. Method is through the rectum touches the prostate by wearing a needle in the 22-gauge needle on the catheter, along the curved tip of the index finger piercing the gland, about