Zobrazeno 1 - 10
of 269
pro vyhledávání: '"Transmission Scan"'
Publikováno v:
CrystEngComm. 23:4648-4657
Laser scanning is investigated to measure the deflection of the crystal–melt interface during Czochralski-growth of silicon. A mid-infrared laser is used to take advantage of the IR-transparency of silicon. The method is tested at room temperature
Autor:
João M. Sousa, Lieuwe Appel, Mathias Engström, Stergios Papadimitriou, Dag Nyholm, Håkan Ahlström, Mark Lubberink
In positron emission tomography (PET), 68Ge-transmission scanning is considered the gold standard in attenuation correction (AC) though not available in current dual imaging systems. In this experimental study we evaluated a novel AC method for PET/m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d668ba2f5ce735b45351e20d789db9b
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-474156
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-474156
Autor:
Jürgen Scheins, Jörg Felder, Suk-Min Hong, Lutz Tellmann, Christoph Lerche, Chang-Hoon Choi, Elena Rota Kops, N. Jon Shah
Publikováno v:
IEEE transactions on medical imaging 41(5), 1104-1113 (2022). doi:10.1109/TMI.2021.3132576
Simultaneous MR-PET/-SPECT is an emerging technology that capitalises on the invaluable advantages of both modalities, allowing access to numerous sensitive tracers and superior soft-tissue contrast alongside versatile functional imaging capabilities
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a423d9471fffcb95878def76702ed64
https://hdl.handle.net/2128/31171
https://hdl.handle.net/2128/31171
Publikováno v:
Annals of Nuclear Medicine. 33:916-929
Positron emission tomography (PET) scans of imaging receptors require 60–90-min dynamic acquisition for quantitative analysis. Head movement is often observed during scanning, which hampers the reliable estimation of quantitative parameters. This s
Autor:
Tufve Nyholm, Dietmar Georg, Stephan Witoszynskyj, Ivo Rausch, Marcus Hacker, Piotr Andrzejewski, B. Knäusl
Publikováno v:
Physica Medica. 65:76-83
Hybrid PET/MR offers new opportunities in radiation oncology for tissue/tumour characterisation and response assessment. Attenuation correction (AC) is an important issue especially in the presence ...
Publikováno v:
Proc SPIE Int Soc Opt Eng
Attenuation compensation (AC) is a pre-requisite for reliable quantification and beneficial for visual interpretation tasks in single-photon emission computed tomography (SPECT). Typical AC methods require the availability of an attenuation map obtai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b904a838351732e03d64280d2c8c4ef4
http://arxiv.org/abs/2102.05318
http://arxiv.org/abs/2102.05318
Autor:
Rolf A. Heckemann, Inés Mérida, Nicolas Costes, Alexander Hammers, Mark Lubberink, João M. Sousa, Lieuwe Appel, Dag Nyholm, Mathias Engström, Stergios Papadimitriou, Håkan Ahlström
Publikováno v:
EJNMMI Physics, Vol 7, Iss 1, Pp 1-22 (2020)
Background A valid photon attenuation correction (AC) method is instrumental for obtaining quantitatively correct PET images. Integrated PET/MR systems provide no direct information on attenuation, and novel methods for MR-based AC (MRAC) are still u
Autor:
Matthew A. Kupinski, Yansong Zhu, Ashequr Rahman, Eric Clarkson, Eric C. Frey, Abhinav K. Jha
Publikováno v:
Inverse Probl
The potential to perform attenuation and scatter compensation (ASC) in single-photon emission computed tomography (SPECT) imaging without a separate transmission scan is highly significant. In this context, attenuation in SPECT is primarily due to Co
Autor:
Slobodan Devic, Saad Aldelaijan
Publikováno v:
Physica Medica. 49:112-118
Objective Different dose response functions of EBT3 model GafChromic™ film dosimetry system have been compared in terms of sensitivity as well as uncertainty vs. error analysis. We also made an assessment of the necessity of scanning film pieces be
Publikováno v:
Academic radiology
Rational and Objectives This study aims to evaluate the diagnostic utility of breast imaging using transmission ultrasound. We present readers' accuracy in determining whether a breast lesion is a cyst versus a solid using transmission ultrasound as