Noninvasive inter- and intrafractional motion control in ultrahypofractionated radiation therapy of prostate cancer using RayPilot HypoCath™-a substitute for gold fiducial-based IGRT?

Purpose: In ultrahypofractionated radiation concepts, managing of intrafractional motion is mandatory because tighter margins are used and random errors resulting from prostate movement are not averaged out over a large number of fractions. Noninvasive live monitoring of prostate movement is a desirable asset for LINAC-based prostate stereotactic body radiation therapy (SBRT).

Methods: We prospectively analyzed a novel live tracking device (RayPilot HypoCath™; Micropos Medical AB, Gothenburg, Sweden) where a transmitter is noninvasively positioned in the prostatic urethra using a Foley catheter in 12 patients undergoing ultrahypofractionated intensity-modulated radiation therapy (IMRT) of the prostate.

Pouch Reshaping for Significant Weight Regain after Roux-en-Y Gastric Bypass.

Background: Significant weight regain after Roux-en-Y gastric bypass (RYGB) occurs in around 20 % of patients in the long term. Anatomical reasons include dilatation of the gastric pouch and/or the pouch-jejunal anastomosis, leading to loss of restriction. Pouch reshaping (PR) aims at reestablishing restriction with a subsequent feeling of satiety.

Structural brain changes related to bilingualism: does immersion make a difference?

Within the field of neuroscientific research on second language learning, considerable attention has been devoted to functional and recently also structural changes related to second language acquisition. The present literature review summarizes studies that investigated structural changes related to bilingualism. Furthermore, as recent evidence has suggested that native-like exposure to a second language (i.