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Standard Enthalpy of Formation02:37

Standard Enthalpy of Formation

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Enthalpy changes are typically tabulated for reactions in which both the reactants and products are at the same conditions. A standard state is a commonly accepted set of conditions used as a reference point for the determination of properties under other different conditions. For chemists, the IUPAC standard state refers to materials under a pressure of 1 bar and solutions at 1 M and does not specify a temperature. Many thermochemical tables list values with a standard state of 1 atm. Because...
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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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Measurement: Standard Units03:38

Measurement: Standard Units

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Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results.
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Calculating Standard Free Energy Changes02:49

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The free energy change for a reaction that occurs under the standard conditions of 1 bar pressure and at 298 K is called the standard free energy change. Since free energy is a state function, its value depends only on the conditions of the initial and final states of the system. A convenient and common approach to the calculation of free energy changes for physical and chemical reactions is by use of widely available compilations of standard state thermodynamic data. One method involves the...
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Standard Solutions01:14

Standard Solutions

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Standard solutions refer to solutions with a precisely known concentration or composition. A primary standard is a highly pure, high molar mass, stable substance that is entirely soluble in water, the most commonly used solvent in analytical chemistry. The primary standard solution can be used to standardize secondary standards, which are substances with known concentrations but are less pure and stable. Standard solutions are essential for achieving accurate and reliable results in analytical...
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Nurses bear specific legal responsibilities under several federal statutes, including:
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Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy
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Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy

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New standards in prostate biopsy.

José Marenco1, Veeru Kasivisvanathan2, Mark Emberton2

  • 1Department of Urology. University College London Hospitals NHS Foundation Trust. London. UK.

Archivos Espanoles De Urologia
|March 12, 2019
PubMed
Summary
This summary is machine-generated.

Multiparametric MRI is revolutionizing prostate cancer diagnosis by enabling targeted biopsies. This approach improves detection of significant cancers while reducing diagnosis of insignificant prostate cancer and associated risks like sepsis.

Keywords:
Biopsia prostáticaDiagnóstico del cáncer de próstataMultiparametric MRIProstate biopsyProstate cancer diagnosisRMN multiparamétrica

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Area of Science:

  • Urology
  • Medical Imaging
  • Oncology

Background:

  • Prostate cancer diagnosis traditionally relies on PSA screening and systematic transrectal ultrasound (TRUS) biopsies.
  • This established pathway is prone to errors, leading to both overdiagnosis of insignificant cancers and missed diagnoses of significant prostate cancer.
  • The TRUS biopsy method also carries a risk of sepsis.

Purpose of the Study:

  • To review the evolving landscape of prostate cancer diagnostic methods.
  • To highlight the impact of technological advancements, particularly multiparametric MRI, on current diagnostic paradigms.
  • To evaluate the potential of novel imaging and biopsy techniques in improving diagnostic accuracy and patient outcomes.

Main Methods:

  • A narrative literature review was conducted focusing on prostate cancer diagnostic strategies.
  • The review analyzed traditional methods (PSA screening, TRUS biopsy) and emerging technologies.
  • Comparative effectiveness of different biopsy approaches, including targeted biopsy, was assessed.

Main Results:

  • Multiparametric MRI (mpMRI) offers improved visualization of prostate cancer lesions, facilitating a less invasive triage for biopsy.
  • Targeted biopsy techniques, guided by mpMRI, show promise in enhancing the detection of clinically significant prostate cancer while reducing the detection of insignificant cancer.
  • Other imaging modalities like Elastography, histoscanning, and contrast-enhanced ultrasound are also gaining attention.

Conclusions:

  • Multiparametric MRI represents a significant advancement with the potential to fundamentally alter prostate cancer diagnosis.
  • A shift towards targeted-only biopsy approaches is feasible and beneficial for improving cancer detection rates and reducing unnecessary diagnoses.
  • These advancements aim to mitigate the risks associated with overtreatment and invasive procedures.