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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2018.2868674
|2 doi
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|a eng
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|a Sheikh, Rafi
|e verfasserin
|4 aut
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| 245 |
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|a Clinical Translation of a Novel Photoacoustic Imaging System for Examining the Temporal Artery
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|c 2019
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|a Text
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|a Date Completed 12.02.2020
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|a Date Revised 12.02.2020
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|a published: Print
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|a Citation Status MEDLINE
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|a The objective was to provide a clinical setup for photoacoustic imaging (PAI) of the temporal artery in humans and to describe the challenges encountered and methods of overcoming them. The temporal artery was examined in seven patients with suspect giant-cell arteritis (GCA), both in vivo and ex vivo, and the results were compared to that of histology. To adapt PAI to the human studies, the transducer was fixed to an adjustable arm to reduce motion artifacts, and a stepping motor was developed to enable 3-D scanning. Risks associated with the use of lasers, ultrasound, and electrical equipment were evaluated by measuring energy levels, and safety precautions were undertaken to prevent injury to the patients and staff. The PAI spectra obtained clearly delineated the artery wall, both in vivo and ex vivo, although the latter was of high quality due to the lack of artifacts. The results could be compared to that of histology. The involved energy levels were found to be below the limits given in regulatory standards. Eye protectors prevented irradiation of the patient's eyes, and visual function after the procedure was found not to be affected. The patients reported no discomfort during the investigations. PAI provides images of the temporal artery wall that may be used for the future diagnosis of GCA in humans. The technique could be further refined by addressing the specific problems of motion artifacts and interference from blood and other chromophores. This study paves the way for other clinical applications of PAI
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cinthio, Magnus
|e verfasserin
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|a Dahlstrand, Ulf
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| 700 |
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|a Erlov, Tobias
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1 |
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|a Naumovska, Magdalena
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| 700 |
1 |
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|a Hammar, Bjorn
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|a Zackrisson, Sophia
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1 |
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|a Jansson, Tomas
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| 700 |
1 |
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|a Reistad, Nina
|e verfasserin
|4 aut
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| 700 |
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|a Malmsjo, Malin
|e verfasserin
|4 aut
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|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
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|g 66(2019), 3 vom: 01. März, Seite 472-480
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