Takao Hiraki’s work on interventional radiology

Abstract

Dr. Takao Hiraki is a scientist carrying out interventional radiology research in the Department of Radiology at Okayama University Medical School, Japan. He has conducted animal and human clinical studies on interventional radiology for various conditions. For example, he clarified the hepatic hemodynamic changes caused by hepatic venous occlusion. He also developed new devices, such as hydrogel coils for the occlusion of the aneurismal sac after an endovascular stent-graft of an aortic aneurysm to prevent endoleakage and small intestinal submucosa-covered stents for transjugular intrahepatic portosystemic shunts. Further, he performed a number of studies on the radiofrequency ablation of lung cancer, mediastinal lymph node metastasis, and computed tomography-fluoroscopy-guided lung biopsies. He intends to continue to dedicate his academic career to expand the role of interventional radiology in clinical medicine.

Lung Density in the Trajectory Path—A Strong Indicator of Patients Sustaining a Pneumothorax during CT-Guided Lung Biopsy

“…Pneumothorax is reported to occur in 17 to 26.6% of patients, with 1 to 14.2% requiring chest tube insertion [2]. Risk factors for pneumothorax during PNLB include as follows: patient's age [3], greater lesion depth [4], lower lobe lesion [5], needle trajectory angle less than 45 degrees [3,5,6], lesion size [7], increased number of pleural passes [8] and radiographic emphysema [9].…”