Expiration Breath-Hold for SBRT in Liver and Abdominal Tumors

[Availability of using diaphragm matching in stereotactic body radiotherapy (SBRT) at the time in breath-holding SBRT for liver cancer].

PURPOSE Liver image guided radiation therapy (IGRT) based on bone matching risks generating serious target positioning errors for reasons of lack of reproducibility of expiration breath hold. We therefore investigated the feasibility of 3D image matching between planning CT images and pretreatment cone-beam computed tomography (CBCT) images based on diaphragm surface matching. METHOD 27 liver...

Acetone Expiration and Breath-alcohol Testing

In many countries breath-alcohol testing is a well established method to control driving under the influence of alcohol. Various analytical principles are used to measure the alcohol concentration in expired breath, such as gas chromatography, electrochemical cells, semiconductors, and infrared spectrometry. A breath-alcohol analyzer based on the last method was demonstrated at the last meeting...

Comparison of Dixon Methods for Fat Suppression in Single Breath-Hold 3D Gradient-Echo Abdominal MRI

Introduction A variety of Dixon methods has been proposed over the last years that permit a robust fat suppression in inhomogeneous magnetic fields [1-3]. Apart from different strategies to separate water and fat signal, the individual methods are mainly characterized by the number of echo times, or points, that they rely on and by the constraints that they impose on these echo times. In this w...

Hold your breath!

R egeneration, the process by which an animal restores lost cells or body parts, occurs throughout the animal kingdom, including vertebrates, planarians and cnidarians such as hydra (Tanaka & Reddien, 2011). However, the ability to regenerate varies between species, and within a species it can be different for different body parts. Salamanders, such as axolotls and newts, possess the most impre...

Abdominal compression during lung SBRT