Landmark Measurement
Landmark Measurement - Related Videos
04:47
Systematic Bronchoscopy: the Four Landmarks Approach
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Cited by 4 •
2023
Here, we present a protocol to navigate the bronchial maze in a structured manner, splitting the bronchoscopy into a stepwise approach-the four landmarks approach.
05:22
Systematic Endobronchial Ultrasound - The Six Landmarks Approach
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Cited by 1 •
2023
Endobronchial ultrasound-guided sampling using transbronchial needle aspiration plays a key role in staging and diagnosing lung cancer. We propose a systematic stepwise approach dividing the procedure into six landmarks that should be taught to new operators.
10:23
Three-Dimensional Cephalometric Landmark Annotation Demonstration on Human Cone Beam Computed Tomography Scans
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Cited by 2 •
2023
Presented here is a detailed protocol for the conduction of three-dimensional cephalometric analysis with the use of human cone beam computed tomography scans.
08:42
Where You Cut Matters: A Dissection and Analysis Guide for the Spatial Orientation of the Mouse Retina from Ocular Landmarks
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Cited by 21 •
2018
This protocol provides a comprehensive dissection and analysis guide for the use of deep ocular landmarks, s-opsin immunohistochemistry, Retistruct, and custom code to accurately and reliably orient the isolated mouse retina in anatomical space.
07:22
Standardized Method for Measuring Collection Efficiency from Wipe-sampling of Trace Explosives
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Cited by 7 •
2017
Optimized sampling protocols and the development of new wipe materials can be facilitated by standardized measurements of collection efficiency from wipe-sampling. Our approach for sampling trace explosives uses an automated device to control speed, force, and distance during wipe-sampling followed by extraction of collected explosives.
FAQs
Standardized landmarks make measurements comparable across patients, examiners, and time. When the same anatomical reference points are defined and located consistently, distances, angles, and proportions can be recorded in a common framework rather than described inconsistently. This consistency supports objective monitoring, comparison among patients, and research involving anatomy, biomechanics, rehabilitation, or changes in growth and development.
Reliability depends on how clearly landmarks are defined, how consistently they are located, and whether measurements are taken under controlled conditions. The selected assessment approach also matters because landmarks may be identified through physical examination or medical imaging. Careful standardization helps reduce variation in recorded positions, distances, angles, or proportions and strengthens comparisons between measurements.
Each measurement type describes a different spatial relationship. Positions locate anatomical points, distances quantify separation, angles characterize orientation, and proportions compare dimensions relative to one another. Together, these measurements provide a more complete description of human structure than any single value. In medical studies, combining them can support analysis of anatomy, biomechanics, development, or change over time.
A typical workflow begins by defining the anatomical landmarks and the measurements required. The landmarks are then located through physical examination or medical imaging, followed by calculation of positions, distances, angles, or proportions. Controlled conditions are maintained so results can be compared appropriately. The resulting measurements can then be used for assessment, planning, monitoring, or research.
Clinicians can apply landmark measurement during physical assessment, diagnosis, treatment planning, and surgical navigation. Quantitative relationships among anatomical points provide an objective way to describe a patient’s structure and support decisions that require consistent spatial information. Repeated measurements can also help evaluate change over time, while standardized data allow comparison among patients in clinical or research settings.
Both approaches can be used to locate clearly identifiable anatomical reference points, but they obtain that information through different assessment settings. Physical examination provides a direct clinical route, whereas medical imaging supplies an imaging-based route for identifying landmarks. Using a defined landmark framework allows measurements from either approach to be organized as positions, distances, angles, or proportions.
Repeated quantitative measurements allow clinicians and researchers to evaluate change over time rather than relying only on descriptive impressions. The data can document growth and development, support objective monitoring, and enable comparisons among patients. In research, the same measurements contribute to studies of anatomy, biomechanics, rehabilitation, and personalized care by providing consistent structural information for analysis.