http://219.127.129.30/ikiw/index.php?en. Results: Using level v15 format QR code, 600 bytes of data were encoded to one cell. One cell of QR code included ...
9–12 September 2012, Copenhagen, Denmark
P27.11 CTG recording storage using 2D bar code (QR code) digital expression; based on the proposal for MFER (Medical Waveform Format Encoding Rule) N. Shinozuka1 , R. Fujishige2 Lab. Fetal Medicine Research, Hiratsuka, Japan; 2 Toitsu Co., Yokohama, Japan 1
Objectives: 2D bar coding is one of the methods to enable the health /medical data portability for prior and existing health care record system. Several field trial of PHR (Personal Health Record) project has been carried out in Japan. For standardize CTG digital record for PHR, we proposed MFER for CTG and data expression by 2D bar code (QR code). Methods: 1) Digital CTG recording signal was formatted adding a special profile header for MFER. 2) Two types of waveform data description format for MFER ware proposed, row data mode and compressed mode. 3) Row mode contained 2ch of FHR signals at 250msec and 1ch of tocogram signals at 1 sec whereas compressed mode contained FHR of 1 sec and tocogram of 2 sec. 4) QR code format v.15 (cell size 77 × 77) of error correction level M was applied for this trial. 5) Based on the MFER proposal, experimental system of CTG QR code generator and viewer was developed. ref: QR code http://www.denso-wave.com/qrcode/index-e.html MFER http://219.127.129.30/ikiw/index.php?en Results: Using level v15 format QR code, 600 bytes of data were encoded to one cell. One cell of QR code included 113 sec of recording. Using consecutive 16 QR cells could handle 30.2 min of serial CTG recording. Using iPad, QR coded CTG was successfully replayed. Conclusions: CTG recording format for EHR/PHR by MFER was proposed. Further study was required to confirm clinical feasibility, QR code format of CTG should be one of the cost beneficial way for PHR/EHR. Supporting information can be found in the online version of this abstract.
P27.12 Preliminary study of three-dimensional computed tomography in post-mortem fetal spinal and skeletal anomalies L. Wang1 , N. An2 , X. Wang2 1
Ultrasound Department, Chinese PLA General Hospital, Beijing, China; 2 Radiology Department, Chinese PLA General Hospital, Beijing, China Objectives: To assess the value of the three-dimensional computed tomography on dead fetuses in promoting the study of fetal spinal and skeletal anomalies. Methods: 7 fetuses with spinal or skeletal malformations after being diagnosed by antenatal ultrasound examination in our hospital had been medically induced between January 2008 and December 2011. Images of them by multidetector CT-scan and 3D volume rendering were obtained after pregnancy termination. Their gestational ages ranged form 16 to 30 weeks (average 23). The antenatal ultrasound diagnosis was scoliosis in 1 case, isolated short long bones in 2, thanatophoric dysplasia in 1, left hand deformity in 1, multiple deformities (absence of right radius, cleft lip and palate, single umbilical artery) in 1 and cystic structure within sacrococcygeal region considered spina bifida in 1 case. Results: Satisfactory 3D CT reconstruction images were obtained in all 7 fetuses. The 3D CT diagnosis was in consistency with that of antenatal ultrasound in 5 cases but revealed details of skeletal malformation in clearer and direct views. The 3D CT clearly revealed that the 6th , 7th and 9th hemi-thoracic vertebrae as well as the complicated rib anomalies in the scoliosis fetus. In the fetus with
Ultrasound in Obstetrics & Gynecology 2012; 40 (Suppl. 1): 171–310
Poster abstracts
sacrococcygeal bifida 3D CT clearly showed spina bifida of the 5th lumber and sacral vertebrae. Conclusions: The post-mortem 3D CT reconstruction images of the spina or skeletal anomaly fetuses can clearly and accurately reveal the details of the malformations and make definite diagnosis. It’s helpful in improving the diagnostic level of prenatal ultrasonography.
P27.13 New approach for fetal larynx and pharynx biometry using 3DUS acquired images G. Liberty1 , R. Boldes2 , O. Shen3 , S. Yagel4 1
Obstetrics and Gynecology, Barzilai Medical Center, Ashkelon, Israel; 2 Obstetrics and Gynecology, Bikur Holim Medical Center, Jerusalem, Israel; 3 Obstetrics and Gynecology, Shaare Zedek Medical Center, Jerusalem, Israel; 4 Obstetrics and Gynecology, Hadassah-Hebrew University Medical Centers, Mt. Scopus, Jerusalem, Israel
Objectives: The 2D sonographic appearance of the fetal upper respiratory tract has been described, and the larynx, pharynx, and surrounding structures measured. We aimed to identify structures comprising the fetal larynx and pharynx using 3DUS to establish 3DUS-based measures of these structures. Recognition of the normal anatomy is important to confirm or exclude anomalies and in fetal interventions involving the upper airway. Methods: Gravidae with singleton fetuses of confirmed GA of 11–24 wks were enrolled. Transabdominal 3DUS (Voluson E6 with DRAB 4–8 transducer) scan of the fetal neck was acquired during fetal quiescence and in the absence of body or airway movements. Multi-planar reconstruction (MPR) in post-processing allowed adjustment of the volume to obtain the coronal plane. After a learning curve to understand the sono-anatomy of the target area, the pharynx width and height, upper, middle, and lower larynx width, and larynx height were measured. Results: 582 fetuses were examined; target anatomy was imaged successfully in 218 patients at 11–24 gestational weeks. Acquisition added ∼1 minute to exam time. Measurements required ∼3 minutes. Rates of successful visualization increased significantly as pregnancy progressed, from 23% in 1st trimester to 88% at 20–24 wks (P < 0.01). Scatterplots of measured structures v. GA were created. All measures correlated with GA. Pharynx width ranged from 0.11 cm-0.93 cm (mean 0.48 ± 0.17); pharynx height ranged from 0.23–2.01 cm (mean 0.94 ± 0.33); upper larynx width ranged from 0.04–0.37 cm (0.15 ± 0.07); middle larynx width ranged from 0.08–0.77 cm (mean 0.34 ± 0.16); lower larynx width ranged from 0.05–0.64 cm (0.24 ± 0.11); and larynx height ranged from 0.2–1.83 cm (0.71 ± 0.31). Conclusions: The fetal larynx and pharynx can be visualized and measured with 3DUS in the late 1st and 2nd trimester of pregnancy. Knowledge of normal anatomy and biometry may prove useful in the evaluation of anatomic or functional pathologies involving the fetal upper respiratory tract, or in cases of fetal intervention such as balloon emplacement in diaphragmatic hernia.
P27.14 Normal ranges of anterior bregma angle using three dimensional rendered mode – preliminary results A. R. Hatanaka, L. C. Rolo, L. Nardozza, R. Mattar, W. Hisaba, E. Araujo Junior, A. F. Moron ˜ Paulo, Brazil Obstetrics, UNIFESP-EPM, Sao Objectives: To stablish normal ranges of fetal anterior bregma angle ˆ between 18 and 24 weeks of pregnancy, using three dimensional (ba) (3D) rendered mode ultrasound Methods: 44 pregnant women between 18 to 24 weeks of pregnancy were included in this cross-sectional study. Voluson 730 Expert equipped with transabdominal transducer was used. A middle two
277
