pulse sequence


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pulse sequence

in magnetic resonance imaging, a series of changes in the induced magnetic field, which include the phase and frequency-encoding gradients and read-out functions.

pulse sequence

the sequence of radiofrequency pulses and magnetic gradients used to generate a magnetic resonance image.

pulse sequence

An MRI term for a preselected set of defined radio frequency and gradient pulses, which are repeated multiple times during a scan, through which the time intervals between pulses and the amplitude and shape of the gradient waveforms control NMR signal reception and affect the characteristics of the resulting images.

pulse se·quence

(pŭls sē'kwĕns)
magnetic resonance imaging A series of changes in the induced magnetic field, which includes the phase and frequency-encoding gradients and read-out functions.
References in periodicals archive ?
Nevertheless, the tremendous natural variability in lesion load in individual patients observed on serial scanning--as much as 10% to 20% from month to month--represents a far greater obstacle to the statistical demonstration of true treatment effects in clinical trials than the technical MRI parameters of slice thickness, pulse sequence or contrast medium dose.
These limits are particularly relevant to RF-intensive pulse sequences such as fast spin echo, steady-state free precession, and 3D gradient echo.
No special pulse sequences are required, and this technique is available on nearly every MR system.
In MRI, these metabolites can be quantified with the use of dedicated coils and pulse sequences and are better detected at higher field strengths.
There is little doubt, however, that ongoing developments in machine hardware, pulse sequence design, and image reconstruction methods will address these shortcomings in future times.
Images obtained with conventional SE pulse sequences take longer and are prone to motion artifacts; thus, supplementary techniques, such as fat suppression, are mandatory.
The MSK Extreme with v-SPEC has a versatile proprietary spectrometer design which uses host software to dynamically create pulse sequence waveforms and synchronize them with extreme precision.
7,054,686, teaches use of a high frequency pulse sequence in place of a single pacing signal so that stimulation of the heart can occur with lower energy, a technique with the potential to improve battery life of implantable devices.
The high-field advantage and gradient system of the OrthOne enhances clinical flexibility and productivity with a wide range of pulse sequence imaging options at fast acquisition speeds.
Adapt and test magnetic resonance pulse sequences to enhance neurovascular studies.
On April 5, the University Medical Center Utrecht began installing the first generation MRI-guided radiation therapy system for non-clinical testing, which includes the performance evaluation of MRI pulse sequences, testing of different adaptive delivery methods, establishing quality assurance techniques and defining workflow.
The 12 chapters also discuss setting up a breast MRI practice, pulse sequences, acquisition techniques, computer-aided detection methods, breast implant evaluation, and MRI-guided core biopsy.