title: [White and black in nuclear magnetic resonance (NMR). Impulse sequences and their significance in the NMR image].
abstract: In order to understand how pulse sequences affect what is black and what is white in Nuclear Magnetic Resonance (NMR) images, the tissue parameters (proton density; relaxation times T1 and T2) are related to the operator selectable controls (type of pulse sequence; repetition time TR; interpulse delay TI; echo delay TE). The pulse sequences "Saturation Recovery"; "Inversion Recovery"; "Spin Echo" are discussed. The authors also analyze the effect of flowing blood on NMR images.
mesh_terms: D001921:Brain / Q000000981:diagnostic imaging; D017023:Coronary Angiography; D004452:Echocardiography; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D013679:Technology, Radiologic; D014057:Tomography, X-Ray Computed
vernacular_title: Bianco e nero in risonanza nucleare magnetica (RNM). Sequenze di impulsi e loro significato nell'immagine RNM.