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RSNA 2003 Scientific Papers > Multislice Helical CT: The Quality of Multiplanar ...
 
  Scientific Papers
  SESSION: Neuroradiology/Head and Neck (Head and Neck Cancer: Staging and Recurrence)

Multislice Helical CT: The Quality of Multiplanar Reconstruction Images Using Variable Reconstruction Parameters with Multislice Helical CT in Head and Neck Neoplasms

  DATE: Wednesday, December 03 2003
  START TIME: 10:40 AM
  END TIME: 10:47 AM
  LOCATION: Room N228
  CODE: K14-979
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PARTICIPANTS
PRESENTER
Ying Liang MD, PhD
Beijing People's Rep of China
 
CO-AUTHOR
Dehong Luo MD, PhD
 
Ning Wu MD
 

Keywords
Computed tomography (CT)
Head and neck neoplasms, CT
 
Abstract:
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Purpose: To assess the MPR image quality in variable reconstrution parameters with multislice helical CT in the head and neck neoplasms and to explore the optimal reconstruction parameters.

Methods and Materials: Sixty-seven patients with head and neck tumor were scanned with 1.25-mm collimation and pitch of 0.875 using GE Lightspeed Ultra 8 slices helical CT. All patients were divided into two groups. In the first group (n=28), 1.25-mm-thick and 2.5-mm-thick section with 50% section overlap were reconstructed, the MPR images were obtained with 1-mm, 2-mm, 3-mm, and 5-mm reformations. In the second group (n=39), 1.25-mm-thick section with 0%, 25%, 50%, and 75% section overlap were reconstructed, while the MPR images were obtained with 1-mm reformation. The images of each group were submitted to two blinded radiologists who separatedly ranked them from best to worst.

Results: In the first group , the MPR image quality of 1-mm reformation with 1.25-mm reconstruction was superior to the others to reveal soft tissue, lesion, and bone (P<0.01). The artifacts viewed on MPR images were slight and had no influence on diagnosis. In the second group, the MPR image quality of 50% section overlap was similar to 75% section overlap (P>0.05) and superior to the others to reveal soft tissue and lesions , was inferior to 75% section overlap to reveal bone (P<0.05) , was less than 75% slice overlap in artifacts (P<0.01).

Conclusion: 1.25-mm-thick reconstruction with 50% section overlap and 1-mm reformation were the optimal parameters to reveal soft tissue, lesion, bone , and had less artifacts in the MPR images with multislice helical CT in the head and neck neoplasms.

 

 

 


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