Technical note: Evaluation of the dose enhancement effect for a novel transmission-type x-ray tube using the Monte Carlo method.

Purpose: Transmission-target x-ray tubes generate more x-rays than reflection thick-target x-ray tubes. A transmission x-ray tube combined with radiosensitizers has a better radiation enhancement effect. This study investigated the feasibility of using a transmission x-ray tube with radiosensitizers in clinical radiotherapy and its effect on radiation dose enhancement.

The evaluation of an on-site monitoring program for activity meter quality assurance with exemption-level sources.

This paper discusses the feasibility of a monitoring program for the quality assurance status of activity meters. We sent a questionnaire to clinical nuclear medicine departments of medical institutions, requesting information on their activity meters and quality assurance practices. On-site visits were conducted with exemption-level standard sources (Co-57, Cs-137 and Ba-133) for dose calibrators in nuclear medicine departments including physical inspection, accuracy and reproducibility.

Results of the performance test for quality assessment of personal radiation dosimetry services including the influence of the dosimeter readout frequency.

This study was to determine the significance of factors considered for the measurement accuracy of personal dosimeter in dosimetry services such as dosimetry service, irradiation category, years of use and readout frequency. The investigation included management information questionnaire, on-site visit and blind test. The blind test with random selected personal badge was used in inter-comparison of eight dosimetry services, and the test results followed ANSI/HPS N13.

The Analysis with Quantitative Indexes for Public's Awareness of Radiation Knowledge in Taiwan.

(1) Background: The purpose of this study was to evaluate the radiation awareness level of the public in Taiwan. (2) Methods: This study designed an online survey form to investigate the radiation awareness level with six topics: basic knowledge of radiation, environmental radiation, medical radiation, radiation protection, and university/corporate social responsibility. The score of respondents were converted into knowledge and responsibility indexes for the quantitative evaluation.

Skin Surface Dose for Whole Breast Radiotherapy Using Personalized Breast Holder: Comparison with Various Radiotherapy Techniques and Clinical Experiences.

Purpose: Breast immobilization with personalized breast holder (PERSBRA) is a promising approach for normal organ protection during whole breast radiotherapy. The aim of this study is to evaluate the skin surface dose for breast radiotherapy with PERSBRA using different radiotherapy techniques.

Materials And Methods: We designed PERSBRA with three different mesh sizes (large, fine and solid) and applied them on an anthropomorphic(Rando) phantom.

Accuracy Evaluation of Collapsed Cone Convolution Superposition Algorithms for the Nasopharynx Interface in the Early Stage of Nasopharyngeal Carcinoma.

This study combined the use of radiation dosimeteric measurements and a custom-made anthropomorphic phantom in order to evaluate the accuracy of therapeutic dose calculations at the nasopharyngeal air-tissue interface. The doses at the nasopharyngeal air-tissue interface obtained utilizing the Pinnacle and TomoTherapy TPS, which are based on collapsed cone convolution superposition (CCCS) algorithms, were evaluated and measured under single 10 × 10 cm, 2 × 2 cm, two parallel opposed 2 × 2 cm and clinical fields for early stage of nasopharyngeal carcinoma by using EBT3, GR-200F, and TLD 100. At the air-tissue interface under a 10 × 10 cm field, the TPS dose calculation values were in good agreement with the dosimeter measurement with all differences within 3.

Estimation of the Surface Dose in Breast Irradiation by the Beam Incident Angle and the 1 cm Depth Dose.

To develop a method of estimating surface dose in whole breast irradiation, we used an anthropomorphic phantom with accessories for the simulation of different breast sizes. The surface points, which are measured by TLDs, are set along with two main directions, superior-inferior and medial-lateral. The incident angle between the photon beam and the surface and the doses at 1 cm beneath the surface at every point are assessed by a computerized treatment planning system (cTPS).

[Evaluation of the effectiveness of treatment of 16 patients with tongue microcystic lymphatic malformation using bipolar coagulation forceps combined with 1% lauromacrogol foam sclerotherapy].

Purpose: To investigate the clinical efficacy and safety of bipolar coagulation forceps combined with 1% lauromacrogol foam sclerotherapy in the treatment of microcystic lymphatic malformation of tongue.

Methods: The clinical data of 16 patients with microcystic lymphatic malformation of the tongue admitted to the Department of Stomatology of Foshan First People's Hospital from April 2017 to April 2020 were retrospectively analyzed, including 7 males and 9 females, aging from 15 months to 21 years. The average age of patients was 8.

[DSA types and treatment strategy of venous malformations of the tongue： an analysis of 132 consecutive patients].

Purpose: To explore the DSA classification and treatment strategy of tongue venous malformation.

Methods: From February 2016 to February 2019, the DSA manifestations of 132 cases with venous malformations of the tongue were summarized. They were classified into 4 types according to imaging characteristics: typeⅠ(non-drainage type), typeⅡ(lower- drainage type), type Ⅲ (higher-drainage type), type Ⅳ(extensive type).

Sialendoscopy-assisted intraoral incision approach for the treatment of posterior Wharton's duct stones: our experience and outcomes.

Introduction: Sialoliths can be removed by sialendoscopy in some cases. But sometimes it fails if the stone is located in the proximal or hilum of Wharton's duct.

Aim: To evaluate the clinical efficacy of the sialendoscopy-assisted intraoral incision approach to remove large stones located in the proximal or hilum of Wharton's duct, when sialendoscopy alone fails.

Epidural Tube: A Useful Device in Sialendoscopy Operations.

Salivary endoscopy, which was first described in 1991, is a safe technique with few complications. The sialendoscopy operation has been developed and successfully offered as a minimally invasive and gland-preserving approach for the treatment of chronic obstructive sialadenitis. For many surgeons, entering the duct lumen of the salivary gland is the most difficult and time-consuming step of the sialendoscopy operation.

Surgical excision of sialoblastoma in the parotid gland in newborn.

Objectives: To evaluate outcome of surgical excision of sialoblastoma in the parotid gland in newborn.

Patients And Methods: This was a retrospective review of 3 pediatric patients with sialoblastoma in the parotid gland that underwent surgical resections. All patients are newborn boys.

[Expression of transforming growth factor-β(1) and Ki-67 nuclear antigen in salivary gland mucoepidermoid carcinoma].

Objective: To investigate the expression and significance of transforming growth factor-β(1) (TGF-β(1)) and Ki-67 nuclear antigen in salivary gland mucoepidermoid carcinoma.

Methods: The expression of TGF-β(1) and Ki-67 nuclear antigen in 20 cases of salivary gland pleomorphic adenoma and 45 cases of mucoepidermoid carcinoma were detected by the streptavidin-peroxidase immunohistochemical method.

Results: Expression of TGF-β(1) (39/45) and Ki-67 nuclear antigen (43/45) in mucoepidermoid carcinoma was significantly higher than in pleomorphic adenoma (P < 0.

[Use of lower trapezius musculocutaneous pedicle flap in repairing of maxillofacial region penetrating defect].

Objective: To investigate an safe and effective new technology (treatment) to repair maxillofacial region penetrating defect.

Methods: The lower trapezius musculocutaneous flap is parallel just like as two leaves which is connected to each other, and was folded to provide the liner of oral cavity and external cover.

Results: Totally twelve folding lower trapezius musculocutaneous pedicle flap survived.