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Titolo:
ALONGSIDE CONVENTIONAL COLOR-DOPPLER, 2 N EW PROCEDURES ARE AVAILABLEALLOWING REPRESENTATION OF CONSIDERABLY SLOWER BLOOD-FLOW VELOCITIES - THE MAXIMUM-ENTROPY METHOD (MEM) AND ULTRASOUND ANGIOGRAPHY (POWER DOPPLER)
Autore:
SOHN C; WESKOTT HP; SCHIESSER M;
Indirizzi:
UNIV HEIDELBERG,FRAUENKLIN,SEKT PRANTALE & GYNAKOL ULTRASCHALLDIAGNOST & THE,VOSSSTR 9 D-69115 HEIDELBERG GERMANY STADT KRANKENHAUSES SILOAH,MED KLIN 2 HANNOVER GERMANY
Titolo Testata:
Ultraschall in der Medizin
fascicolo: 3, volume: 17, anno: 1996,
pagine: 138 - 142
SICI:
0172-4614(1996)17:3<138:ACC2NE>2.0.ZU;2-V
Fonte:
ISI
Lingua:
GER
Keywords:
CONVENTIONAL COLOR DOPPLER; MAXIMUM ENTROPY METHOD (MEM); ULTRASOUND ANGIOGRAPHY (POWER DOPPLER); SLOW BLOOD FLOW VELOCITIES; SENSITIVITY; DIAGNOSIS OF ORGAN AND TUMOR PERFUSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
C. Sohn et al., "ALONGSIDE CONVENTIONAL COLOR-DOPPLER, 2 N EW PROCEDURES ARE AVAILABLEALLOWING REPRESENTATION OF CONSIDERABLY SLOWER BLOOD-FLOW VELOCITIES - THE MAXIMUM-ENTROPY METHOD (MEM) AND ULTRASOUND ANGIOGRAPHY (POWER DOPPLER)", Ultraschall in der Medizin, 17(3), 1996, pp. 138-142

Abstract

Aim: The sensitivity of the two procedures for slow blood flow velocities in two flow phantoms examined and compared to conventional colourDoppler. Method: In two phantoms with vessels between 0.3 and 6 mm diameter the slowest measurable blood flow with the different techniqueswas determined. The influence of various application angles was also studied. Results: The slowest blood flow velocity detected with the MEM technique was 0.6 mm/s and with the angio-technique 0.4 mm/s. Two different scan-heads were used; a 5 MHz probe for the MEM procedures anda 10 MHz probe for ultrasound angiography. Using a 10 MHz scan-head will most likely lead to increased sensitivity of MEM. Blood flow representation with the MEM technique is real-time, while several seconds of acquisition time are required for the angio-technique, which is a disadvantage during clinical use. Conventional Doppler was merely able to represent 15 mm/s blood flow. The angio-technique was less dependenton the application angle than the MEM procedure. Conclusion: The definitely increased sensitivity of the two colour methods open up new areas in the diagnosis of organ and tumour perfusion.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 12:48:23