Region Of Interest Placement
Region Of Interest Placement - Related Videos
06:57
Arterial Line Placement
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2023
Source: Sharon Bord, MD, Department of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA When monitoring patients, it is important to obtain values that are accurate and reliable. Blood pressure monitoring is one of the essential vital signs, and for a majority of patients, measuring it utilizing non-invasive techniques provides accurate values. However, there are situations in which the blood pressure requires more exact, specific, and reliable measurements.
09:51
Intraosseous Needle Placement
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2023
Source: Julianna Jung, MD, FACEP, Associate Professor of Emergency Medicine, The Johns Hopkins University School of Medicine, Maryland, USA For unstable patients requiring urgent administration of medications, fluids, or blood products, establishing vascular access quickly is essential. However, there are many factors that can complicate placement of a peripheral intravenous cannula (PIV), and it is extremely common for PIV attempts to fail. PIV placement may be technically challenging in small...
01:03
IR Frequency Region: Fingerprint Region
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2024
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1. The...
02:40
The Eukaryotic Promoter Region
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2020
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
06:58
Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement
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Cited by 21 •
2016
Non-restraining EEG radiotelemetry is a valuable methodological approach to record in vivo long-term electroencephalograms from freely moving rodents. This detailed protocol describes stereotaxic epidural and deep intracerebral electrode placement in different brain regions in order to obtain reliable recordings of CNS rhythmicity and CNS related behavioral stages.
FAQs
Manual, semi-automatic, and software-assisted placement differ in how much of the boundary selection is performed by the user. This choice can affect how consistently the same anatomical structure, lesion, or tissue area is outlined when quantitative measurements are compared. Standardizing the selected approach helps make results more comparable across image assessments and research analyses.
Boundary accuracy matters because every included pixel or voxel contributes to the calculated measurement, while surrounding structures can alter the result if they are unintentionally included. A narrowly and appropriately delineated area supports more focused estimates of tissue density, signal intensity, size, or contrast enhancement than an imprecisely positioned area.
Region Of Interest Placement can be performed in radiography, computed tomography, magnetic resonance imaging, and ultrasound. The selected target may be an anatomical structure, lesion, or tissue area, while the intended analysis may focus on density, signal intensity, size, or contrast enhancement. Matching the selected area to the intended measurement keeps analysis focused.
Consistent placement ensures that measurements are derived from comparable anatomical locations or tissue areas rather than from changing boundaries. This supports more reliable comparison between image assessments and helps distinguish meaningful imaging differences from variation caused by selection. In research settings, that consistency also strengthens reproducibility when investigators repeat or compare quantitative analyses.
A typical workflow begins by identifying the relevant anatomical structure, lesion, or tissue area within the medical image. The user then selects and delineates its boundary manually, semi-automatically, or with image-segmentation software. After the region is defined, measurements can be calculated from the included pixels or voxels while excluding surrounding structures.
Once the relevant area is selected, analysis can focus on tissue density, signal intensity, size, contrast enhancement, or other imaging features. The specific measurement depends on the medical image and the analytical goal. Because the calculation is restricted to the delineated pixels or voxels, the resulting value is tied to the selected anatomical or tissue region.
The technique is useful when clinicians or investigators need focused quantitative information from a medical image. It can support clinical interpretation, treatment planning, and research analyses across several imaging modalities. By applying a defined boundary consistently, teams can compare imaging features more systematically and improve the reproducibility of findings.