TY - JOUR
T1 - Preliminary study on evaluation of the pancreatic tail observable limit of transabdominal ultrasonography using a position sensor and CT-fusion image
AU - Sumi, Hajime
AU - Itoh, Akihiro
AU - Kawashima, Hiroki
AU - Ohno, Eizaburo
AU - Itoh, Yuya
AU - Nakamura, Yosuke
AU - Hiramatsu, Takeshi
AU - Sugimoto, Hiroyuki
AU - Hayashi, Daijuro
AU - Kuwahara, Takamichi
AU - Morishima, Tomomasa
AU - Kawai, Manabu
AU - Furukawa, Kazuhiro
AU - Funasaka, Kohei
AU - Nakamura, Masanao
AU - Miyahara, Ryoji
AU - Katano, Yoshiaki
AU - Ishigami, Masatoshi
AU - Ohmiya, Naoki
AU - Goto, Hidemi
AU - Hirooka, Yoshiki
PY - 2014/8
Y1 - 2014/8
N2 - Background and aim Transabdominal ultrasonography (US) is commonly used for the initial screening of bilio-pancreatic diseases in Asian countries due to its widespread availability, the non-invasiveness and the cost-effectiveness. However, it is considered that US has limits to observe the area, namely the blind area. The observation of the pancreatic tail is particularly difficult. The goal of this study was to examine the pancreatic tail region that cannot be visualized on transverse scanning of the upper abdomen using US with spatial positional information and factors related to visualization, and observation of the tail from the splenic hilum. Methods Thirty-nine patients with pancreatic/biliary tract disease underwent CT and US with GPS-like technology and fusion imaging for measurement of the real pancreatic length and the predicted/real unobservable (PU and RU) length of the pancreatic tail. RU from US on transverse scanning and the real pancreatic length were used to determine the unobservable area (UA: RU/the real pancreatic length). Relationships of RU with physical and hematological variables that might influence visualization of the pancreatic tail were investigated. Results The real pancreatic length was 160.9 ± 16.4 mm, RU was 41.0 ± 17.8 mm, and UA was 25.3 ± 10.4%. RU was correlated with BMI (R = 0.446, P = 0.004) and waist circumferences (R = 0.354, P = 0.027), and strongly correlated with PU (R = 0.788, P < 0.001). The pancreatic tail was visible from the splenic hilum in 22 (56%) subjects and was completely identified in 13 (33%) subjects. Conclusions Combined GPS-like technology with fusion imaging was useful for the objective estimation of the pancreatic blind area.
AB - Background and aim Transabdominal ultrasonography (US) is commonly used for the initial screening of bilio-pancreatic diseases in Asian countries due to its widespread availability, the non-invasiveness and the cost-effectiveness. However, it is considered that US has limits to observe the area, namely the blind area. The observation of the pancreatic tail is particularly difficult. The goal of this study was to examine the pancreatic tail region that cannot be visualized on transverse scanning of the upper abdomen using US with spatial positional information and factors related to visualization, and observation of the tail from the splenic hilum. Methods Thirty-nine patients with pancreatic/biliary tract disease underwent CT and US with GPS-like technology and fusion imaging for measurement of the real pancreatic length and the predicted/real unobservable (PU and RU) length of the pancreatic tail. RU from US on transverse scanning and the real pancreatic length were used to determine the unobservable area (UA: RU/the real pancreatic length). Relationships of RU with physical and hematological variables that might influence visualization of the pancreatic tail were investigated. Results The real pancreatic length was 160.9 ± 16.4 mm, RU was 41.0 ± 17.8 mm, and UA was 25.3 ± 10.4%. RU was correlated with BMI (R = 0.446, P = 0.004) and waist circumferences (R = 0.354, P = 0.027), and strongly correlated with PU (R = 0.788, P < 0.001). The pancreatic tail was visible from the splenic hilum in 22 (56%) subjects and was completely identified in 13 (33%) subjects. Conclusions Combined GPS-like technology with fusion imaging was useful for the objective estimation of the pancreatic blind area.
KW - Blind area of pancreas image
KW - Fusion image of CT and US
KW - GPS-like technology
KW - Transabdominal ultrasonography (US)
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U2 - 10.1016/j.ejrad.2014.05.009
DO - 10.1016/j.ejrad.2014.05.009
M3 - Article
C2 - 24906246
AN - SCOPUS:84903747792
SN - 0720-048X
VL - 83
SP - 1324
EP - 1331
JO - European journal of radiology
JF - European journal of radiology
IS - 8
ER -