[Evaluation of Absorbed Dose for CBCT in Image-guided Radiation Therapy: Comparison of Each Devices and Facilities].

Recently, intensity-modulated radiation therapy (IMRT) is used worldwide, highly accurate verification of the location using image-guided radiation therapy (IGRT) has become critical. However, the use of cone-beam computed tomography (CBCT) to ascertain the location each time raises concerns about its influence on radiotherapy dosage and increased radiation exposure. The purpose of this study was to measure the absorbed dose using nine kilovoltage (kV) devices and two megavoltage (MV) devices (total 11 devices) at eight facilities, compare the absorbed dose among the devices, and assess the characteristics of the respective devices to ensure optimal clinical operation.

[Impact of exposure dose reduction of radiation treatment planning CT using low tube voltage technique].

Purpose: The aim of this study was to reduce the exposed dose of radiotherapy treatment planning computed tomography (CT) by using low tube voltage technique.

Materials And Methods: We used tube voltages of 80 kV, 100 kV, and 120 kV, respectively. First, we evaluated exposure dose with CT dose index (CTDI) for each voltage.

[A pilot study of intraperitoneal gemcitabine for reduction of peritoneal dissemination in advanced pancreatic cancer].

We schemed intraperitoneal gemcitabine (ipGEM) for reduction of peritoneal dissemination to three patients with unresectable and one patient with recurrent pancreatic cancer, followed by intraperitoneal catheter and subcutaneous port placement. Two locally advanced cases were performed for intra-operative radiotherapy, and one of 2 locally advanced cases was performed for gastrojejunostomy. And another locally advanced case had ileostomy.

[Clinical significance of eosinophilic cationic protein in serum and bronchoalveolar lavage fluid of adult patients with mycoplasmal pneumonia].

Pathogenic mechanisms of mycoplasmal pneumonia is not fully understood at present though some kind of cell-mediated hypersensitivity is closely related to its mechanisms. Though eosinophilia in peripheral blood are sometimes revealed in patient with mycoplasmal pneumonia, it is not unclear whether eosinophils related to its pathogenesis, or not. We evaluated the clinical significance of ECP in serum and BAL fluid in patients with mycoplasmal pneumonia.