Evaluation Study of Fast Spectral Estimators Using In-vivo Data

Kristoffer Lindskov Hansen; Fredrik Gran; Mads Møller Pedersen; Iben Kraglund Holfort; Jørgen Arendt Jensen; Michael Bachmann Nielsen

doi:10.1109/ULTSYM.2009.5441525

Evaluation Study of Fast Spectral Estimators Using In-vivo Data

Kristoffer Lindskov Hansen, Fredrik Gran, Mads Møller Pedersen, Iben Kraglund Holfort, Jørgen Arendt Jensen, Michael Bachmann Nielsen

Copenhagen University Hospital Herlev and Gentofte

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

Spectrograms in medical ultrasound are usually estimated with Welch's method (WM). To achieve sufficient spectral resolution and contrast, WM uses an observation window (OW) of up to 256 emissions per estimate. Two adaptive filterbank methods have been suggested to reduce the OW: Blood spectral Power Capon (BPC) and the Blood Amplitude and Phase EStimation method (BAPES). Ten volunteers were scanned over the carotid artery. From each dataset, 28 spectrograms were produced by combining four approaches (WM with a Hanning window (W.HAN), WM with a boxcar window (W.BOX), BPC and BAPES) and seven OWs (128, 64, 32, 16, 8, 4, 2). The full-width-at-half-maximum (FWHM) and the ratio between main and side lobe levels were calculated for each spectrogram. Furthermore, all 280 randomized spectrograms were presented to nine radiologists for visual evaluation: useful/not useful. BAPES and BPC compared to WM had better resolution (lower FWHM) for all OW0.05) at OW 128 and 64, while W.BOX scored less (p

Original language	English
Title of host publication	2009 IEEE International Ultrasonics Symposium (IUS)
Publisher	IEEE
Publication date	2009
Pages	1359-1362
ISBN (Print)	978-1-4244-4389-5
DOIs	https://doi.org/10.1109/ULTSYM.2009.5441525
Publication status	Published - 2009
Event	2009 IEEE International Ultrasonics Symposium - Ergife Palace Hotel, Rome, Italy Duration: 20 Sept 2009 → 23 Sept 2009 http://ewh.ieee.org/conf/ius_2009/ https://ieeexplore.ieee.org/xpl/conhome/5430769/proceeding

Conference

Conference	2009 IEEE International Ultrasonics Symposium
Location	Ergife Palace Hotel
Country/Territory	Italy
City	Rome
Period	20/09/2009 → 23/09/2009
Internet address	http://ewh.ieee.org/conf/ius_2009/ https://ieeexplore.ieee.org/xpl/conhome/5430769/proceeding

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Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

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title = "Evaluation Study of Fast Spectral Estimators Using In-vivo Data",

abstract = "Spectrograms in medical ultrasound are usually estimated with Welch's method (WM). To achieve sufficient spectral resolution and contrast, WM uses an observation window (OW) of up to 256 emissions per estimate. Two adaptive filterbank methods have been suggested to reduce the OW: Blood spectral Power Capon (BPC) and the Blood Amplitude and Phase EStimation method (BAPES). Ten volunteers were scanned over the carotid artery. From each dataset, 28 spectrograms were produced by combining four approaches (WM with a Hanning window (W.HAN), WM with a boxcar window (W.BOX), BPC and BAPES) and seven OWs (128, 64, 32, 16, 8, 4, 2). The full-width-at-half-maximum (FWHM) and the ratio between main and side lobe levels were calculated for each spectrogram. Furthermore, all 280 randomized spectrograms were presented to nine radiologists for visual evaluation: useful/not useful. BAPES and BPC compared to WM had better resolution (lower FWHM) for all OW0.05) at OW 128 and 64, while W.BOX scored less (p",

author = "Hansen, {Kristoffer Lindskov} and Fredrik Gran and Pedersen, {Mads M{\o}ller} and Holfort, {Iben Kraglund} and Jensen, {J{\o}rgen Arendt} and Nielsen, {Michael Bachmann}",

note = "Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.; 2009 IEEE International Ultrasonics Symposium, IUS 2009 ; Conference date: 20-09-2009 Through 23-09-2009",

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AU - Jensen, Jørgen Arendt

AU - Nielsen, Michael Bachmann

N1 - Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

PY - 2009

Y1 - 2009

N2 - Spectrograms in medical ultrasound are usually estimated with Welch's method (WM). To achieve sufficient spectral resolution and contrast, WM uses an observation window (OW) of up to 256 emissions per estimate. Two adaptive filterbank methods have been suggested to reduce the OW: Blood spectral Power Capon (BPC) and the Blood Amplitude and Phase EStimation method (BAPES). Ten volunteers were scanned over the carotid artery. From each dataset, 28 spectrograms were produced by combining four approaches (WM with a Hanning window (W.HAN), WM with a boxcar window (W.BOX), BPC and BAPES) and seven OWs (128, 64, 32, 16, 8, 4, 2). The full-width-at-half-maximum (FWHM) and the ratio between main and side lobe levels were calculated for each spectrogram. Furthermore, all 280 randomized spectrograms were presented to nine radiologists for visual evaluation: useful/not useful. BAPES and BPC compared to WM had better resolution (lower FWHM) for all OW0.05) at OW 128 and 64, while W.BOX scored less (p

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BT - 2009 IEEE International Ultrasonics Symposium (IUS)

PB - IEEE

T2 - 2009 IEEE International Ultrasonics Symposium

Y2 - 20 September 2009 through 23 September 2009

ER -

Evaluation Study of Fast Spectral Estimators Using In-vivo Data

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