Results 91 to 100 of about 87,568 (329)

Attenuation correction for TOF-PET with a limited number of stationary coincidence line-sources [PDF]

, 2013
INTRODUCTION Accurate attenuation correction remains a major issue in combined PET/MRI. We have previously presented a method to derive the attenuation map by performing a transmission scan using an annulus-shaped source placed close to the edge of the ...
Karp, Joel, Keereman, Vincent, Mollet, Pieter, Perkins, Amy, Vandenberghe, Stefaan   +4 more
core  

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

An Image-Based Prior Knowledge-Free Approach for a Multi-Material Decomposition in Photon-Counting Computed Tomography

Diagnostics
Photon-counting CT systems generally allow for acquiring multiple spectral datasets and thus for decomposing CT images into multiple materials. We introduce a prior knowledge-free deterministic material decomposition approach for quantifying three ...
Jonas Neumann, Tristan Nowak, Bernhard Schmidt, Joachim von Zanthier   +3 more
doaj   +1 more source

Adaptive Bayesian Iterative Transmission Reconstruction for Attenuation Correction in Myocardial Perfusion Imaging with SPECT/Slow-Rotation Low-Output CT Systems

International Journal of Biomedical Imaging, 2007
Objectives. SPECT/slow-rotation low-output CT systems can produce streak artifacts in filtered backprojection (FBP) attenuation maps, impacting attenuation correction (AC) in myocardial perfusion imaging.
Ji Chen, Ernest V. Garcia, Russell D. Folks, Aharon Peretz, James R. Galt   +4 more
doaj   +1 more source

Dosimetric evidence confirms computational model for magnetic field induced dose distortions of therapeutic proton beams

, 2017
Given the sensitivity of proton therapy to anatomical variations, this cancer treatment modality is expected to benefit greatly from integration with magnetic resonance (MR) imaging.
Bussmann, Michael, Gantz, Sebastian, Hoffmann, Aswin L, Lühr, Armin, Oborn, Bradley M, Schellhammer, Sonja M   +5 more
core   +1 more source

Crosstalk between the ribosome quality control‐associated E3 ubiquitin ligases LTN1 and RNF10

FEBS Letters, EarlyView.
Loss of the E3 ligase LTN1, the ubiquitin‐like modifier UFM1, or the deubiquitinating enzyme UFSP2 disrupts endoplasmic reticulum–ribosome quality control (ER‐RQC), a pathway that removes stalled ribosomes and faulty proteins. This disruption may trigger a compensatory response to ER‐RQC defects, including increased expression of the E3 ligase RNF10 ...
Yuxi Huang, Satoshi Hashimoto, Sota Ito, Chisato Kikuguchi, Miho Hoshi, Kiyoshi Yamaguchi, Yoichi Furukawa, Toru Suzuki, Toshifumi Inada   +8 more
wiley   +1 more source

Miniature probe for mapping mechanical properties of vascular lesions using acoustic radiation force optical coherence elastography

Scientific Reports, 2017
Cardiovascular diseases are the leading cause of fatalities in the United States. Atherosclerotic plaques are one of the primary complications that can lead to strokes and heart attacks if left untreated. It is essential to diagnose the disease early and
Yueqiao Qu, Teng Ma, Youmin He, Mingyue Yu, Jiang Zhu, Yusi Miao, Cuixia Dai, Pranav Patel, K. Kirk Shung, Qifa Zhou, Zhongping Chen   +10 more
doaj   +1 more source

Multiscale analysis of 1-rectifiable measures II: characterizations

, 2017
A measure is 1-rectifiable if there is a countable union of finite length curves whose complement has zero measure. We characterize 1-rectifiable Radon measures $\mu$ in $n$-dimensional Euclidean space for all $n\geq 2$ in terms of positivity of the ...
Badger, Matthew, Schul, Raanan
core   +1 more source

Protein pyrophosphorylation by inositol pyrophosphates — detection, function, and regulation

FEBS Letters, EarlyView.
Protein pyrophosphorylation is an unusual signaling mechanism that was discovered two decades ago. It can be driven by inositol pyrophosphate messengers and influences various cellular processes. Herein, we summarize the research progress and challenges of this field, covering pathways found to be regulated by this posttranslational modification as ...
Sarah Lampe, Tanmay Kumar Mohanty, Rashna Bhandari, Dorothea Fiedler   +3 more
wiley   +1 more source

Evaluation of external beam hardening filters on image quality of computed tomography and single photon emission computed tomography/computed tomography

Journal of Medical Physics, 2015
This study was undertaken to evaluate the effect of external metal filters on the image quality of computed tomography (CT) and single photon emission computed tomography (SPECT)/CT images.
Nivedita Rana, Dinesh Rawat, Madan Parmar, Devinder Kumar Dhawan, Ashok Kumar Bhati, Bhagwant Rai Mittal   +5 more
doaj   +1 more source