Biomaterial Database

[In vivo nuclear magnetic resonance tomography measurement of vocal cord temperature during phonation]. 1991

F Klingholz, and V Reiman, and T Vogel

HNO-Klinik, Universität München, Klinikum Grosshadern, BRD.

In the glottal area, a series of transversal sections was recorded by means of a nuclear magnetic resonance tomograph using the technique of fast FLASH recording. During the record, the subject uttered the vowel [a:] with 180 Hz and 80 dB(A). The flip angle (35 degrees C) was chosen so as to get maximum contrast in the tissue tomogram due to a temperature shift. The tissue temperature was evaluated by the measurement of the dependence of the relaxation time on the temperature in a gelatinized and doped test solution which was similar in relaxation times to the tissue. In the vocal folds, the temperature increased by about 4 degrees C after prolonged phonation (20 x 20 s). The importance of this technique and the result is discussed with reference to the phonatory function of the larynx.

UI	MeSH Term	Description	Entries
D008279	Magnetic Resonance Imaging	Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.	Chemical Shift Imaging,MR Tomography,MRI Scans,MRI, Functional,Magnetic Resonance Image,Magnetic Resonance Imaging, Functional,Magnetization Transfer Contrast Imaging,NMR Imaging,NMR Tomography,Tomography, NMR,Tomography, Proton Spin,fMRI,Functional Magnetic Resonance Imaging,Imaging, Chemical Shift,Proton Spin Tomography,Spin Echo Imaging,Steady-State Free Precession MRI,Tomography, MR,Zeugmatography,Chemical Shift Imagings,Echo Imaging, Spin,Echo Imagings, Spin,Functional MRI,Functional MRIs,Image, Magnetic Resonance,Imaging, Magnetic Resonance,Imaging, NMR,Imaging, Spin Echo,Imagings, Chemical Shift,Imagings, Spin Echo,MRI Scan,MRIs, Functional,Magnetic Resonance Images,Resonance Image, Magnetic,Scan, MRI,Scans, MRI,Shift Imaging, Chemical,Shift Imagings, Chemical,Spin Echo Imagings,Steady State Free Precession MRI
D010699	Phonation	The process of producing vocal sounds by means of VOCAL CORDS vibrating in an expiratory blast of air.	Phonations
D010700	Phonetics	The science or study of speech sounds and their production, transmission, and reception, and their analysis, classification, and transcription. (Random House Unabridged Dictionary, 2d ed)	Speech Sounds,Sound, Speech,Sounds, Speech,Speech Sound
D001833	Body Temperature Regulation	The processes of heating and cooling that an organism uses to control its temperature.	Heat Loss,Thermoregulation,Regulation, Body Temperature,Temperature Regulation, Body,Body Temperature Regulations,Heat Losses,Loss, Heat,Losses, Heat,Regulations, Body Temperature,Temperature Regulations, Body,Thermoregulations
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014827	Vocal Cords	A pair of cone-shaped elastic mucous membrane projecting from the laryngeal wall and forming a narrow slit between them. Each contains a thickened free edge (vocal ligament) extending from the THYROID CARTILAGE to the ARYTENOID CARTILAGE, and a VOCAL MUSCLE that shortens or relaxes the vocal cord to control sound production.	Vocal Fold,Vocal Folds,Vocal Ligament,Cord, Vocal,Cords, Vocal,Fold, Vocal,Folds, Vocal,Ligament, Vocal,Ligaments, Vocal,Vocal Cord,Vocal Ligaments