Image‐Guided Adaptive Brachytherapy for Cervical Cancer Using Magnetic Resonance Imaging: Overview and Experience

Image-guided adaptive brachytherapy (IGABT) using magnetic resonance imaging (MRI) has been accepted as a novel treatment technique for cervical cancer. During the development of MRI-based IGABT, a very important concept called “High-risk clinical target volume (HR-CTV)” was introduced. However, computed tomography (CT)-based IGABT is the most common modality in Japan

EFFECTS OF STRETCH-SHORTENING CYCLE DURING TRUNK-TWIST EXERCISE USING DIFFERENT LOADS

The purpose of this study was to investigate the effects of stretch-shortening cyde (SSC) movement during bunk-twist and whether the effects change on increasing the loads by using a special trunk-twist machine. Twenty-one male college students performed trunktwist exercise with 3 loads. Participants performed this exercise for each load by using SSC and not using SSC (CON). Kinematic and kinetic data were recorded using Vimn system (250 Hz) and force platform (1,000 Hz). The following effects of SSC for this exercise were observed: (1) peak bar angular velocity was not potentiated by SSC, but SSC contributed to the acceleration of bar angular velocity and (2)for heavy loads, SSC did not affect mean angular velocity of the bar, upper trunk and pelvic rotation. Moreover, peak joint torque power of trunk-twist significantly decreased with heavy loads

Effects of drop height and load on ground reaction force and joint kinetics of the lower extremity during the drop clean

The purpose of this study was to identify the characteristics of lower extremity joint kinetics during the drop clean based on the plyometric theory. Twelve male track-and-field athletes performed the drop clean under four conditions. Kinematic and kinetic data were collected using a Vicon motion system (250 Hz) and force platforms (1,000 Hz). The results of these analyses were as follows:　(1)The peak vertical ground reaction force, joint torque of the ankle joint, and torque power of the hip and ankle joints during the drop clean were significantly greater than those during the hang power clean.　(2)During the drop clean, force development was achieved mainly by the hip joint during the descending phase and by the ankle joint during the ascending phase.　(3) The joint torque of the ankle in the descending phase, and the joint torque and joint torque power in the ascending phase were increased when the total mechanical energy was increased by the mass factor. The joint torque and joint torque power of the ankle in the descending phase were increased when the total mechanical energy was increased by the velocity factor.　(4)Even if the magnitude of the mechanical energy was the same, the vertical ground reaction force in the descending phase during the velocity-type drop clean was larger than that during the mass-type drop clean. The ground reaction force, joint torque of the hip, and joint torque power of the hip in the ascending phase during the mass-type drop clean were larger than those during the velocity-type drop clean

COMPARISON OF PULL AND CATCH PHASES DURING CLEAN EXERCISESE

The purpose of this study was to identify differences in kinetic characteristics between the performed the PC at 30%, 60%, and 90% of one repetition maximum. Kinetic data were collected from recorded data by using a Vicon motion system and force platforms. In the comparison between the pull and catch phases, the kinetic characteristics of the catch phase were as follows: 1) The peak ground reaction force did not significantly differ according to load. 2) Ankle and knee kinetics showed large values. 3) The force and power in the ankle and knee did not significantly differ between the light load (30%) and heavy load (90%). Therefore, the importance of using PC in training not only for the pull movement but also for the catch movement