Radwa Ahmed - Academia.edu (original) (raw)
Related Authors
Graduate Center of the City University of New York
Uploads
Papers by Radwa Ahmed
International Journal of Advancements in Computing Technology, 2010
In this paper, we describe the concatenation of Turbo/Convolutional codes with transmit and recei... more In this paper, we describe the concatenation of Turbo/Convolutional codes with transmit and receive diversity schemes by using Space-Time Block Code. It is shown that, by using two transmit antennas and one/or two receive antenna, large coding gain for the bit error rate is ...
Benha Medical Journal, 2021
Background: Multi-vessel Doppler ultrasonography is the principal surveillance tools in pregnanci... more Background: Multi-vessel Doppler ultrasonography is the principal surveillance tools in pregnancies complicated by fetal growth restriction. Objective: To determine diagnostic accuracy of the fetal umbilical artery, middle cerebral artery pulsatility indices and their ratio in intrauterine growth restricted fetuses. Patients & Methods: Forty patients were studied that had been diagnosed clinically and ultrasonographically as intra-uterine growth restriction (IUGR). All patients in the study underwent uniform antenatal assessment protocol that includes umbilical artery (UA) and middle cerebral artery (MCA) Doppler ultrasound studies. These were conducted either twice weekly or daily according to the severity of the condition. Results: Abnormal UA PI was found in 25 cases, 11cases due to maternal cause, 5 cases due to placental cause, and 9 cases with idiopathic cause of the IUGR group. Abnormal MCA PI was found in 26 cases, 11 cases due to maternal cause, 5 cases due to placental cause, and 10 cases with idiopathic cause of the IUGR group. Abnormal C/U Ratio was found in 24 cases, 11 cases due to maternal cause, 5 cases due to placental cause, 8 cases with idiopathic cause of the IUGR group. Conclusion: Among the Doppler indices, the C/U ratio is a better predictor of IUGR fetuses than either the UAPI or the MCA PI alone, with a high specificity and PPV. However, measurement of the UAPI (among all the Doppler indices) is enough to detect IUGR per se, probably because UAPI is a direct reflection of the resistance in the placental vascular bed.
International Journal of Advancements in Computing Technology, 2010
In this paper, we describe the concatenation of Turbo/Convolutional codes with transmit and recei... more In this paper, we describe the concatenation of Turbo/Convolutional codes with transmit and receive diversity schemes by using Space-Time Block Code. It is shown that, by using two transmit antennas and one/or two receive antenna, large coding gain for the bit error rate is ...
Benha Medical Journal, 2021
Background: Multi-vessel Doppler ultrasonography is the principal surveillance tools in pregnanci... more Background: Multi-vessel Doppler ultrasonography is the principal surveillance tools in pregnancies complicated by fetal growth restriction. Objective: To determine diagnostic accuracy of the fetal umbilical artery, middle cerebral artery pulsatility indices and their ratio in intrauterine growth restricted fetuses. Patients & Methods: Forty patients were studied that had been diagnosed clinically and ultrasonographically as intra-uterine growth restriction (IUGR). All patients in the study underwent uniform antenatal assessment protocol that includes umbilical artery (UA) and middle cerebral artery (MCA) Doppler ultrasound studies. These were conducted either twice weekly or daily according to the severity of the condition. Results: Abnormal UA PI was found in 25 cases, 11cases due to maternal cause, 5 cases due to placental cause, and 9 cases with idiopathic cause of the IUGR group. Abnormal MCA PI was found in 26 cases, 11 cases due to maternal cause, 5 cases due to placental cause, and 10 cases with idiopathic cause of the IUGR group. Abnormal C/U Ratio was found in 24 cases, 11 cases due to maternal cause, 5 cases due to placental cause, 8 cases with idiopathic cause of the IUGR group. Conclusion: Among the Doppler indices, the C/U ratio is a better predictor of IUGR fetuses than either the UAPI or the MCA PI alone, with a high specificity and PPV. However, measurement of the UAPI (among all the Doppler indices) is enough to detect IUGR per se, probably because UAPI is a direct reflection of the resistance in the placental vascular bed.