Predicting and Suppressing Oversensing of a Pacemaker in Plain X-Ray Photography

• 作者: Giichiro Nakaya Joel Matsumoto Kohki Yoshikawa Kyoichi Ito Masashi Takeda Morio Shimada Norihiko Akiba Osamu Nakamura
• 来源期刊: 放射学期刊(英文)
• 学科: 医学
• 关键词: OVERSENSING PACEMAKER C-MOS General X-RAY Equipment for Diagnosis
• 年，卷（期）: 2012,（4）
• 页码范围: 128-133
• 页数: 6页
• 分类号: R73

摘要

We conducted experiments of oversensing generation of pacemaker (PM) and X-irradiation direction dependency of PM, and examined the oversensing suppression method, using 8 different types of PMs. It was found out from this experiment that oversensing would occur when some conditions (X-irradiation direction, X-irradiation intensity) are met. Oversensing occurred with the most low irradiation conditions (kV × mA) when PM was irradiated at 90° (vertically to C-MOS;Complementary Metal Oxide Semiconductor). The acuter the angle of irradiation is (α > 90° < α), the higher the irradiation conditions (kV × mA) at which oversensing start to occur. In plain X-ray photography, oversensing was confirmed under the irradiation conditions of (cervical spine, thoracic spine, lateral thoracic spine, rib, shoulder joint, collarbone, humerus, and chest).Once the irradiation angle and irradiation conditions (kV × mA) are available, oversensing is predictable to some extent. Our findings will help to predict oversensing generation of plain X-ray photography and suppress oversensing. Oversensing can be suppressed in most of the radiography by lowering tube current to 100 mA, but a 1.0 mm High-Density Tungsten Sheet must be put on PM in high tube voltage radiography.