Implementation of volumetric-modulated arc therapy for locally advanced breast cancer patients: Dosimetric comparison with deliverability consideration of planning techniques and predictions of patient-specific QA results via supervised machine learning.

Purpose: The aim of this study was to implement a clinically deliverable VMAT planning technique dedicated to advanced breast cancer, and to predict failed QA using a machine learning (ML) model to optimize the QA workload.

Methods: For three planning methods (2A: 2-partial arc, 2AS: 2-partial arc with splitting, 4A: 4-partial arc), dosimetric results were compared with patient-specific QA performed with the electronic portal imaging device of the linac. A dataset was built with the pass/fail status of the plans and complexity metrics.

Dyskinesia of the superior oesophageal sphincter: assessment and treatment.

Pharyngo-oesophageal dyskinesias present a common symptomatology associated with those difficulties in swallowing for which the radio-manometric assessment is well known. Radiology, nevertheless, with an overall analysis of deglutition and its iatrogenic complications, as well as manometry of the superior oesophageal sphincter (OSS) with its diversity of results, according to the material, techniques, age, sex and stress involved, has convinced us of the necessity for a supplementary dynamic examination. Electromyography (EMG), simultaneously by the inferior constrictor (IC) and cricopharyngeal (CP) muscles, analyses with precision the electric activity of these two muscles, as well as the pharyngosphincteral synchronism.

[Incomplete dissolution of calculi. Calcification, cholecystectomy, after treatment of biliary lithiasis with chenodeoxycholic acid].

Among 54 patients with radiolucent asymptomatic gallstones treated by chenodeoxycholic acid (CDCA), 32 failures were observed. In 15 cases the size of gallstones did not change. In 11 cases the size of gallstones decreased but dissolution was not complete.

[Recurrence and prevention of recurrence after dissolution of gallbladder lithiasis by chenodeoxycholic acid in 22 patients].

Dissolution of gallstones was observed 33 times in 22 patients. For 11 of them a recurrent lithiasis was dissolved by means of a second or third medical treatment. 21 patients have been followed for 3 to 6 years (median over 4 years).