PET/CT imaging

Clinical case - PET/CT low dose imaging

   
 
     
  Who we are  
 
 
  Doctor RenĂ©e Ahond-Vionnet
Senior Clinical lecturer in Nuclear Medicine Department


Centre Hospitalier De Nevers, Nuclear Medicine Department
Nevers, France


The nuclear medicine department of CH NEVERS, France, led by Dr Ahond-Vionnet, has 2 Gamma-Camera systems (one double-head Millenium MG and one hybrid Infinia Hawkeye4).

Since April 2008, the department is equipped with a GE PET/CT Discovery RX with Motion Free and PET VCAR applications.

This PET/CT system helps clinicians to improve diagnostics and therapy follow-up of patients with cancerous lesions.

Thanks to Motion Free, we help radiotherapy physicists and physicians to define more accurately the irradiation dose and volume for RT planning.

 
  T E P Loire Bourgogne  
     
     
  Patient History  
 
 
 

Female - 45 years old - 163cm - 44kg

 
 

A PET/CT exam was requested for disease staging of voluminous left mediastinal-hilar tumor.

Abdominal and cerebral CT was normal one month ago.

CT : A mass in the left superior lobe with partial atelectasy ; mediastinal adenopathies difficult to differentiate from the left superior mass.

 
 

 

 
     
  Acquisition  
 
 
 

Scanner: GE Discovery RX

 
     
  PET acquisition: Whole-body acquisition  
 
3D acquisition using VUE Point HD reconstruction
Acquisition time: 1 min30 per bed position
Post-injection time : 1h
Dose: 148 MBq of 18F-FDG
 
     
  CT acquisition: Whole-body acquisition  
 
Detector configuration: 16 x 1.25 mm
Slice thickness: 1.25 mm
kVp: 120
mA: 80-160 Smart mA-Auto mA
 
     
     
  Findings
 
 
       
Whole-body static image highlighting the mediastinal-hilar lesion and the uptake in the right cotyle
 

Whole-body static image highlighting the mediastinal-hilar lesion and the uptake in the right cotyle

 
CT and fused views of the mediastinal-hilar lesion with partial  atelectasy   CT and fused views of the mediastinal-hilar lesion with partial atelectasy  

CT and fused views of the mediastinal-hilar lesion with partial atelectasy

Fused coronal and axial views of the uptake in the right cotyle   Fused coronal and axial views of the uptake in the right cotyle  
Fused coronal and axial views of the uptake in the right cotyle  
   
 
 

Thoracic : There is a hypermetabolic left mediastinal-hilar mass, with partial atelectasy on the left superior lobe. Small adenopathies are found in the anterior superior mediastinum.

 
 

There is also a small uptake on the right cotyle.

 
     
     
     
  Conclusion  
 
 
 

Confirmation of a hypermetabolic left mediastinal-hilar mass, with partial atelectasy on the left superior lobe.

Small adenopathies are found in the anterior superior mediastinum.

 
  Uptake on the right cotyle.  
     
 
Fused coronal and axial views of the uptake in the right cotyle
 
   
   
   
   
   
   
     
Who we are  
Patient History  
Acquisition  
Findings  
Conclusion  
     
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