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Titolo:
Three-dimensional CT-guided bronchoscopy with a real-time electromagnetic position sensor - A comparison of two image registration methods
Autore:
Solomon, SB; White, P; Wiener, CM; Orens, JB; Wang, KP;
Indirizzi:
Johns Hopkins Univ, Sch Med, Dept Cardiovasc & Intervent Radiol, Baltimore, MD 21287 USA Johns Hopkins Univ Baltimore MD USA 21287 Radiol, Baltimore, MD 21287 USA Johns Hopkins Univ, Sch Med, Dept Pulm Med, Baltimore, MD 21287 USA Johns Hopkins Univ Baltimore MD USA 21287 lm Med, Baltimore, MD 21287 USA
Titolo Testata:
CHEST
fascicolo: 6, volume: 118, anno: 2000,
pagine: 1783 - 1787
SICI:
0012-3692(200012)118:6<1783:TCBWAR>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSBRONCHIAL NEEDLE ASPIRATION;
Keywords:
bronchoscopy; computers; CT; image-guided surgery; stereotaxy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
8
Recensione:
Indirizzi per estratti:
Indirizzo: Solomon, SB Johns Hopkins Univ, Sch Med, Dept Radiol, Blalock 545,600 N Wolfe St, Baltimore, MD 21287 USA Johns Hopkins Univ Blalock 545,600 N Wolfe St Baltimore MD USA 21287
Citazione:
S.B. Solomon et al., "Three-dimensional CT-guided bronchoscopy with a real-time electromagnetic position sensor - A comparison of two image registration methods", CHEST, 118(6), 2000, pp. 1783-1787

Abstract

Study objectives: To compare two different image registration methods for accurately displaying the position of a flexible bronchoscope on a previously acquired three-dimensional CT scan during bronchoscopy. Setting: Bronchoscopy suite of a university hospital. Patients: Fifteen adult patients scheduled for nonemergent bronchoscopy. Methods: A miniature electromagnetic position sensor was placed at the tipof flexible bronchoscope. Previously acquired three-dimensional CT scans were registered with the patient in the bronchoscopy suite. Registration method 1 used multiple skin fiducial markers. Registration method 2 used the inner surface of the trachea itself for registration. Method 1 was objectively assessed by measuring the error distance between the real skin marker position and the computer display position. Methods 1 and 2 were subjectivelyassessed by the bronchoscopist correlating visual bronchoscopic anatomic location with the computer display position on the CT image. Results: The error distance (+/- SD) from known points for registration method 1 was 5.6 +/- 2.7 mm. Objective error distances were not measured for method 2 because no accurate placement of the bronchoscope sensor could be correlated with CT position, Subjectively, method 2 was judged more accurate than method 1 when compared with the fiberoptic view of the airways through the bronchoscope. Additionally, method 2 had the advantage of not requiring placement of fiducial markers before the CT scan. Respiratory motion contributed an error of 3.6 +/- 2.6 mm, which was partially compensated for by a second hacking sensor placed on the patient's chest. Conclusion: Image registration method 2 of surface fitting the trachea rather than method 1 of fiducial markers was subjectively judged to be superior for registering the position of a flexible bronchoscope during bronchoscopy, Method 2 was also more practical inasmuch as no special CT scanning technique was required before bronchoscopy.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 15:31:00