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Related Concept Videos

Hybrid Zones02:29

Hybrid Zones

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Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
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Zones of Protection01:16

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In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
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Transition Zone01:28

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The transition zone in concrete is a critical area where aggregate meets cement paste, marked by a distinct porosity and weakness compared to the surrounding material. The adhesion around the aggregates is primarily due to Van Der Waals forces. The voids within this zone influence its robustness; initially, it is less durable than the surrounding bulk mortar due to larger voids. Initially, when concrete is compacted, a higher water-cement ratio near the aggregates leads to the formation of...
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Interpreting R Charts01:22

Interpreting R Charts

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R chart, or range chart, is a fundamental tool in statistical process control used to monitor the variability within a process. It complements the X-bar (x̄) chart by focusing on the range of the data, rather than individual values, providing a clear picture of the process dispersion over time.
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The Central Dogma01:25

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Run charts, essentially line graphs plotted over time, serve as fundamental yet effective tools for process analysis. They chronicle data sequentially, facilitating the identification of trends, shifts, or cyclical movements. This graphical representation is instrumental in determining whether a process is stable or exhibits signs of potential instability indicative of special cause variation. In the healthcare domain, run charts depict infection rates over time, enabling hospitals to monitor...
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Related Experiment Video

Updated: Jan 24, 2026

Implantation and Monitoring by PET/CT of an Orthotopic Model of Human Pleural Mesothelioma in Athymic Mice
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Compressed Central Zone Uptake on PSMA PET/CT-A Potential Pitfall in Interpretation.

Rueben Ganeshalingam1, Edward Hsiao

  • 1From the Nuclear Medicine, Royal North Shore Hospital, Sydney, New South Wales, Australia.

Clinical Nuclear Medicine
|May 21, 2019
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Summary

Mild symmetrical uptake in the prostate

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Area of Science:

  • Oncology
  • Nuclear Medicine
  • Radiology

Background:

  • Prostate carcinoma diagnosis and staging are crucial for treatment planning.
  • Prostate-Specific Membrane Antigen (PSMA) Positron Emission Tomography/Computed Tomography (PET/CT) is a key imaging modality for prostate cancer.
  • Accurate interpretation of PSMA PET/CT is essential to avoid misdiagnosis.

Observation:

  • A 66-year-old man with prostate carcinoma showed PSMA uptake in the primary tumor.
  • Mild, symmetrical, and diffuse PSMA uptake was observed in the central zone of the prostate.
  • This central zone uptake was not consistent with tumor activity upon initial assessment.

Findings:

  • Histopathology after radical prostatectomy revealed no tumor in the central zone correlating with the observed PSMA uptake.
  • The increased PSMA uptake in the compressed central zone was identified as a potential imaging pitfall.
  • This finding highlights the importance of careful interpretation in PSMA PET/CT imaging.

Implications:

  • PSMA PET/CT interpretation requires awareness of potential benign findings that can mimic malignancy.
  • Understanding imaging pitfalls can improve diagnostic accuracy in prostate cancer staging.
  • This case underscores the need for correlation with histopathology to confirm or refute imaging findings.