Download Optimizing Image Quality and Dose in Advanced S

Article # WP201403-ELS / Issue Date 04 Mar, 2014
White Paper
Optimizing Image Quality and Dose
in Advanced S-Detector System
Sanghee Choi, Hoyeon Lee/ M.D. / Samsung Medical Center
Introduction
Samsung Medical Center (SMC) is one of the
most renowned hospitals in Korea and is a
prominent contributor in the Asian and global
medical research community. SMC today
consist of a hospital and cancer center which
combined has a floor space of over 320,000
m2 with nearly 2000 beds manned by staffs
of approximately 7,400 who treat over 8000
patients daily. The 655-bed Cancer Center is
the largest of its kind in Asia and proves its
excellence with one of the highest cancer
operation survival rates in the world. SMC has
been using the Samsung XGEO GC80/GU60
systems since 2012 and has experienced high
image quality and patient satisfaction.
XGEO GC80
In 2014 we are expecting to be able to provide
an even more enhanced medical service with
the new improved S-Detector (S4335-W) from
Samsung Electronics.
XGEO GF50
Applied systems
The following systems can be installed with
the new detector: GC80 for large-sized/general
hospitals, Floor-mounted GF50 for small and
medium-sized hospitals/clinics, and GR40W
for Film/CR X-ray equipment.
XGEO GR40CW
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White Paper
Optimizing Image Quality and Dose
in Advanced S-Detector System
Clinical evaluation
Old Detector
CASE 1
New Detector
· Examination type : Chest AP
· Exposure conditions : 75[kVp], 5.6[mAs]
· Clinical opinion : Improvement in terms of spatial resolution and contrast.
CASE 2
Old Detector
New Detector
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· Examination type : L-spine AP
· Exposure conditions : 80[kVp], 32[mAs]
· Clinical opinion : Psoas muscle is better
expressed.
White Paper
Optimizing Image Quality and Dose
in Advanced S-Detector System
Old Detector
New Detector
CASE 3
· Examination type : Hand PA
· Exposure conditions : 46[kVp], 2.9[mAs]
· Clinical opinion: B
one trabeculation is easily distinguishable, medulla & cortex differentiation
works well and the overlapping complex joint can easily be distinguished.
Old Detector
New Detector
CASE 4
· Examination type : Ankle AP
· Exposure conditions : 52[kVp], 3.3[mAs]
· Clinical opinion : E
ven the bone with surgical device can easily be
distinguished without artifacts.
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White Paper
Optimizing Image Quality and Dose
in Advanced S-Detector System
Based on the clinical results of the phantom image testing comparison to the previous detector,
it can be observed that the new detector show improved image quality across-the-board.
The results specifically showed improvement in image contrast and it can be determined that the
overall image quality is excellent.
Performance of S-Detector
The new S4335-W wireless direct deposition FPD shows improvements over Samsung’s previous
detectors DQE (Detective Quantum Efficiency) value. A DQE test shows an improvement of
approximately 8% (65% → 73%, 0.1 lp/mm).
Detective Quantum Efficiency [%]
█ DQE
Spatial Frequency [Ip/mm]
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