Diagnostic Modalities Our division has three helical CT scanners@` one 1.5T MRI system@` two digital subtraction angiographic (DSA) systems@`two gamma cameras with the capacity for single photon emission CT (SPECT)@` two digital radiographic (DR) systems for fluoroscopy@`two mammography and four computed radiographic (CR) systems. One DSA system is equipped with helical CT which we call an IVR-CT system. All these digital image systems enhance the efficacy of routine examination. Services Our Division includes five consulting radiologists and 12 technologists. As our routine work@` every effort is made to produce an integrated report covering all examinations@` such as plain radiographic examinations (chest@` abdomen@` head@` neck@` breast@`bone and other structures)@` contrast radiological procedures (digestive@` urinary and respiratory tracts)@` CT@` MRI@` RI@` angiography and interventional radiology (IVR)@` mainly trans-arterial embolization (TAE). Examination reports are immediately available for physicians who call the radiologist by telephone. The number of patients examined by each procedure in 1997 is shown in the table on statistics. In addition@` several conferences (teleradiologic@` pre- and postoperative) have been regularly held in our division. Research Our division has been developing the system of helical CT with support of the Comprehensive 10-year Strategy for Cancer Control and a new 10-year strategy for cancer control. The technique of helical CT-guided subsegmental TAE for treatment of hepatocellular carcinoma was established in 1995@` and a prospective study assessing its clinical utility is ongoing. To date@` this procedure has shown high therapeutic efficiency while being minimally invasive and minimally burdensome for patients. Helical CT is also applicable to screening for lung cancer. A feasibility study is ongoing in cooperation with the thoracic oncology groups in the National Cancer Center and the Anti-Lung Cancer Association. We have already found 26 lesions of lung cancer in this trial@` with a mean diameter of 16 mm@` and of the 26@` only 8 (32%) were detectable as abnormalities on conventional plain chest X-ray film.