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Related Concept Videos

Acute Kidney Injury II: Pathophysiology01:29

Acute Kidney Injury II: Pathophysiology

Acute kidney injury (AKI) causes are categorized into three primary categories based on the location of the injury: prerenal, intrarenal (or intrinsic), and postrenal causes. This classification guides clinical management and illustrates how different pathways can impair kidney function.Etiology and Pathophysiology of Acute Kidney Injury1. Prerenal causesEtiology: Prerenal Acute Kidney Injury, the most common type, occurs when reduced blood flow to the kidneys decreases filtration capacity...
Diabetic Nephropathy01:28

Diabetic Nephropathy

Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...
Acute Kidney Injury IV: Diagnostic Studies and Prevention01:30

Acute Kidney Injury IV: Diagnostic Studies and Prevention

Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
Nephrons01:10

Nephrons

The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma happens...
Chronic Kidney Disease I: Introduction01:25

Chronic Kidney Disease I: Introduction

Chronic Kidney Disease (CKD) arises when the kidneys progressively lose their ability to function, ultimately leading to end-stage renal disease. At this advanced stage, the kidneys can no longer filter waste or maintain essential body functions, requiring renal replacement therapy (RRT) through dialysis or a kidney transplant for survival.Early-stage chronic kidney disease and detection challengesIn CKD's early stages, symptoms often remain absent because healthy nephrons compensate for...
Acute Kidney Injury I: Introduction01:22

Acute Kidney Injury I: Introduction

Introduction:Acute Kidney Injury (AKI) describes a swift decrease in kidney function occurring over hours to days, characterized by the kidneys' failure to remove waste products from the bloodstream. This leads to dangerous complications like metabolic acidosis, fluid overload, and electrolyte imbalances, such as hyperkalemia, which can cause life-threatening arrhythmias. AKI is common in both hospital and outpatient settings, often triggered by dehydration, sepsis, or exposure to nephrotoxic...

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Non-invasive Imaging of Acute Allograft Rejection after Rat Renal Transplantation Using 18F-FDG PET
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[Radiogenic nephropathy].

M Gotthardt1

  • 1Nucleaire Geneeskunde, Universitair Medisch Centrum St Radboud, Geert Grooteplein 8, 6525 GA Nijmegen, Niederlande. m.gotthardt@nucmed.umcn.nl

Nuklearmedizin. Nuclear Medicine
|December 15, 2010
PubMed
Summary
This summary is machine-generated.

Individual dosimetry is crucial for protecting patients from kidney damage in internal radiotherapy. New, complex models are needed to accurately measure radiation doses to the kidneys from radiolabeled agents.

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Area of Science:

  • Medical Physics
  • Radiochemistry
  • Nuclear Medicine

Context:

  • External beam radiotherapy (EBR) uses patient-individual dosimetry to prevent side effects like radiogenic nephropathy.
  • Current internal radiotherapy practices, using radiolabeled antibody fragments or polypeptides, do not routinely employ individual dosimetry.
  • Significant challenges exist in internal radiotherapy dosimetry compared to EBR due to non-uniform tracer distribution and differing dose rates and radiation ranges.

Purpose:

  • To highlight the challenges in patient dosimetry for internal radiotherapy.
  • To provide an overview of radiotracer accumulation in the kidney.
  • To discuss recent advancements in kidney dosimetry and strategies for reducing kidney uptake.

Summary:

  • Patient-individual dosimetry, standard in EBR, is not yet standard for internal radiotherapy due to complex dose distributions and varying radionuclide properties.
  • Internal radiotherapy presents unique dosimetry challenges, including non-uniform tracer distribution within organs and different dose rates and radiation characteristics compared to EBR.
  • Accurate kidney dosimetry in internal radiotherapy requires more sophisticated models to address non-uniform radiotracer distribution and mitigate risks of radiogenic nephropathy.

Impact:

  • Facilitates the development of more accurate kidney dosimetry models for internal radiotherapy.
  • Informs strategies to minimize radiotracer accumulation in the kidneys, thereby reducing the risk of nephropathy.
  • Enhances patient safety in nuclear medicine by improving radiation dose assessment and management.