Materials
A. PTP made by polyvinyl chloride (PVC) with and without tablet.
(Non Steroidal Anti-Inflammatory Drugs, Loxoprofen sodium) (Figure)
B. PTP polypropylene (PP) with and without tablet.
(Iron medicine, Sodium Ferrous citrate) (Figure)
Fig.
Radiography of PTP
PTPs with and without a tablet attached to thin wooden bars were placed between acryl phantoms in the air. (Figure)
Fig.
Fig.
1) 100kV, 200mA, 10ms, Acryl phantom:10cm (5cm+5cm)
Fig.: PTP made PVC is visualized clearly in lateral projection (b, d), but PP is barely seen (f, h).
2) 60kV, 200mA, 125ms, Acryl phantom:10cm (5cm+5cm)
Fig.: PTPs are visualized more clearly than radiography with 100kV.
3) 100kV, 200mA, 125ms, Acryl phantom:20cm (10cm+10cm)
Fig.: Both PTPs of PVC and PP are barely visualized only in lateral projection.
4) 60kV, 200mA, 125ms, Acryl phantom:20cm (10cm+10cm)
Fig.: PTPs are visualized slightly more clearly than radiography with100kV.
Radiography in head phantom
PTP was placed in the trachea of a head phantom. (Figure)
Fig.
1)PVC: 100kV, 200mA,10-16ms
Fig.: PTP of PVC was visualized only in lateral projection in lateral view of the phantom.
2) PVC: 60kV, 200mA, 125ms
Fig.: PTP of PVC was visualized only in lateral projection in lateral view of the phantom, slightly more clearly than 100kV.
3) PP: 100kV, 200mA, 10-16ms
Fig.: A tablet is clearly visualized, but the PTP of PP is not seen.
4) PP: 60kV, 200mA, 125ms
Fig.: A tablet is slightly more clearly visualized than 100kV, but the PTP of PP is not seen.
CT image
PTPs with and without a tablet attached to thin wooden bars were scanned in air and in water.
Fig.
CT; 64-slice MDCT
Slice thickness: 0.5 mm
Reconstructed image thickness: 5mm, and 1mm
Scaning conditions:
FOV; 20cm
1) 120kV, SD 10, 2) 120kV, SD 5, 3) 80kV, SD10, 4) 80kV, SD5
Window:
1) Lung; Level; -650, Width 1600, 2) Soft-tissue; Level; 35, Width 300
CT of PVC (frontal images) in air
Fig.: PTPs of PVC are visualized clearly with the lung window, but not visualized with the soft tissue window.
CT of PVC (Lateral images) in air
Fig.: PTPs of PVC are visualized clearly on the lung window, but not visualized with the soft-tissue window. The tablets are well visualized.
CT of PVC (Frontal images) in water
Fig.: PTPs are visualized as high attenuation area, especially with the soft tissue window.
Low attenuation spaces are seen around the tablets.
CT of PVC (Lateral images) in water
Fig.: Both PTP of PVC and tablet are detected by high attenuation area clearly.
CT of PP (Frontal images) in air
Fig.: PTPs of PP are visualized as slightly high attenuation area with the lung window, but only tablets are seen with soft-tissue widow.
CT of PP (Lateral images) in air
Fig.: PTPs of PP are visualized as slightly high attenuation area with the lung window, but only tablets are seen with soft-tissue widow.
CT of PP (Frontal images) in water
Fig.: PTPs of PP are barely seen with soft-tissue window.
Low attenuation spaces around the tablets are seen clearly.
CT of PP (Lateral images) in water
Fig.: PTPs of PP are barely seen with soft-tissue window.
Low attenuation spaces around the tablets are seen clearly.
With low kV and low signal-to-noise scan techniques, relatively better images were obtained.