scholarly journals Prenatal Diagnosis of Morbidly Adherent Placenta with 2D Ultrasonography, 3D Color Power Doppler and Magnetic Resonance Imaging

2010 ◽  
Vol 4 (2) ◽  
pp. 199-204
Author(s):  
Sawsan Al Obaidly
Keyword(s):  
Placenta Previa ◽  
Color Doppler ◽  
Power Doppler ◽  
Color Doppler Imaging ◽  
3D Ultrasound ◽  
Massive Hemorrhage ◽  
Uterine Wall ◽  
Doppler Imaging ◽  
Additional Information ◽  
2D Ultrasound

Abstract The incidence of placenta accreta/percreta should rise steadily over the next century as the frequency of cesarean sections and advanced maternal age, both independent risk factors, increases. Patients who are at risk should be identified. The diagnosis of placenta previa accreta/percreta is possible by using gray-scale sonography, conventional color Doppler imaging and MRI through studying the relation of placenta to the uterine wall and nearby pelvic structures. The potentially new modality of 3D and 3D color power Doppler ultrasound has it's value as a tool to achieve significantly increased diagnostic accuracy in the prediction of massive hemorrhage by assessing the extent, location and quantification of abnormal uteroplacental neovascularization. Hence, 3D ultrasound has the potential for providing additional information over conventional 2D ultrasound studies in the diagnosis of placenta previa percreta. The diagnosis and anticipation of the problem achieve the best results for the obstetrician and the patient.

scholarly journals Efficacy of colour doppler imaging in prediction of placenta accrete

2017 ◽  
Vol 6 (10) ◽  
pp. 4377
Author(s):  
Rachna Agarwal ◽  
Sruthi Bhaskaran ◽  
Esha Gupta ◽  
Dipanvita Dutta ◽  
Anupama Tandon
Keyword(s):  
Placenta Accreta ◽  
Placenta Previa ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Final Diagnosis ◽  
Doppler Imaging ◽  
Colour Doppler ◽  
Grey Scale ◽  
Transfusion Requirements ◽  
Caesarean Hysterectomy

Background: In present scenario of increasing cases of previous caesarean section the diagnosis of Placenta accreta preoperatively is of great value to the attending obstetrician. This helps in preparing, counselling the patient and also in assembling a multidisciplinary team for effective peripartum clinical management of these patients to prevent maternal morbidity and mortality.Methods: One hundred patient with persistent placenta previa after 28 weeks gestation were screened by grey scale B mode sonography. In suspicious cases of placenta accreta, further assessment by colour Doppler ultrasound was done. The color doppler imaging (CDI) criteria used were - diffuse intra parenchymal placental lacunar flow, focal intra parenchymal placental lacunar flow, bladder-uterine serosa interphase hypervascularity, prominent sub-placental venous complex and loss of sub-placental vascular signal in areas lacking peripheral sub-placental hypoechoic zone. Patients were prospectively followed up till delivery and the CDI findings were analysed with reference to final diagnosis made during caesarean section.Results: Six of hundred patients exhibited characteristic CDI patterns highly specific for placenta accreta according to the criteria used. In all 6 patients, morbidly adherent placenta was present intraoperatively. The sensitivity and specificity of CDI in the diagnosis of placenta accreta in presentstudy was 100%. Caesarean hysterectomy was required in five patients. Patients with CDI features of lacunar flow had higher incidence of blood loss, transfusion requirements and need for caesarean hysterectomy compared to patients with nonlacunar flow. The remaining 94 patients with placenta previa, not suspicious for placenta accreta on sonography underwent uncomplicated caesarean section.Conclusions: The use of CDI along with conventional grey-scale sonography improves the diagnostic accuracy for prediction of placenta accreta in patients with persistent placenta previa.

Color transcranial “power” Doppler ultrasound of intracranial aneurysms

1996 ◽  
Vol 84 (3) ◽  
pp. 459-461 ◽  
Author(s):  
Joanna M. Wardlaw ◽  
James C. Cannon
Keyword(s):  
Doppler Ultrasound ◽  
Intracranial Aneurysms ◽  
Flow Direction ◽  
Color Doppler ◽  
Power Doppler ◽  
Color Doppler Imaging ◽  
Color Doppler Ultrasound ◽  
Doppler Imaging ◽  
Ultrasound Technique ◽  
Content Type

✓ “Color Doppler energy” (or “power Doppler”), a new color Doppler ultrasound technique that is independent of flow direction and very sensitive to movement, was assessed for its use in the identification of intracranial aneurysms in patients with recent subarachnoid hemorrhage immediately prior to using cerebral angiography. Features that identified aneurysms using this technique included the appearance of abnormal color where no normal artery was expected, abnormal bulging of an artery, and greater “expansibility” of the aneurysm in comparison to an adjacent normal vessel. In this exploratory study, 30 of 33 aneurysms were correctly identified in 35 patients with a good bone window. Color Doppler energy is considerably more sensitive to intracranial blood flow than conventional color Doppler imaging. Color Doppler energy is a useful research tool; if these preliminary results are verified in larger series, in addition to examination for vasospasm, the technique could be used for identification and follow up of aneurysms.

scholarly journals Uterine sparing approaches in management of placenta accreta: a summarized review

2018 ◽  
Vol 8 (1) ◽  
pp. 349
Author(s):  
Ali Hussein ◽  
Ahmed A. Abdelaleem ◽  
Ahmed M. Abbas ◽  
Maher Salah
Keyword(s):  
Placenta Accreta ◽  
Placenta Previa ◽  
Color Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Sonographic Examination ◽  
Cesarean Section Delivery ◽  
Decidua Basalis ◽  
Future Fertility ◽  
Previous Cesarean

Placenta accreta is a potentially life-threatening obstetric condition that required multidisciplinary approach to management. Placenta accreta occurs in complete absence of the decidua basalis. Women with previous cesarean section delivery or placenta previa are known to be at greater risk of placenta accreta. A previous study reported that 24%& 67% increase in the incidence of placenta accreta in women 1 versus 3 or more previous cesarean deliveries respectively. Antenatal diagnosis of placental invasion has the potential to improve maternal and fetal outcomes. In practice, incomplete non-separation of the placenta at delivery leads to massive obstetric hemorrhage resulting in maternal morbidities such as massive blood transfusion, DIC, injury to the bladder and intestines and the need for hysterectomy. Sonographic examination with gray scale and color doppler imaging is the recommended first line modality for diagnosis of morbidly adherent placenta. Techniques developed for conservative management are techniques developed to preserve uterus and future fertility which is crucially linked to societal status and self-esteem.

Prenatal features of a fetal frontal hemangioma assessed by 3D ultrasound and color Doppler imaging

2008 ◽  
Vol 28 (11) ◽  
pp. 1077-1079 ◽  
Author(s):  
P. Capmas ◽  
J. M. Levaillant ◽  
R. Frydman ◽  
M. V. Senat ◽  
O. Picone
Keyword(s):  
Color Doppler ◽  
Color Doppler Imaging ◽  
3D Ultrasound ◽  
Doppler Imaging

scholarly journals The Practice of Using Contrast Sonography for the Differential Diagnosis of Liver Neoplasms

2017 ◽  
pp. 13-19 ◽  
Author(s):  
Z. A. Agaeva ◽  
T. S. Avhadov ◽  
L. V. Gorbov ◽  
E. N. Karanadze
Keyword(s):  
Colorectal Cancer ◽  
Contrast Agent ◽  
Liver Neoplasms ◽  
Color Doppler ◽  
Power Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Group I ◽  
Group Ii ◽  
Benign Liver

Purpose: to improve the differential diagnosis of benign liver rumors and the liver metastasis of colorectal cancer with the ultrasound using contrast sonography.Materials and methods.There were evaluated 92 patients with liver neoplasms (44 (47.8%) women and 48 (52.2%) men) age 41 to 83, with a mean age of 62.8 ± 2.64. Ultrasound exam was carried out in three stages: I stage – liver ultrasound in B-mode, II stage – ultrasound in B-mode with addition of color Doppler imaging and power Doppler scanning, III stage – contrast liver sonography employing the contrast agent SonoVue (Bracco Imaging SpA, Milan, Italy). According to the results of the examination the patients were either surgically treated if there were indications, or the nature of the neoplasm was verified via the needle biopsy. Thus the patients formed two groups: I group (n = 35 (38.0%) – patients with benign liver neoplasms: cavernous hemangiomas – 17, hepatocellular adenomas – 3, focal modular hyperplasia of the liver – 5; II group (n = 57 (62.0%) – patients with metastasis of colorectal cancer.Results.With the use of the ultrasound in B-mode with addition of color Doppler imaging and power Doppler scanning in patients from group I (n = 35) with benign tumors of the liver – bilobar involvement in 2 cases, right lobe involvement in 28 cases, left lobe involvement in 5 cases. There were found both solitary (in 33 cases) and multiple (in 2 cases) neoplasms ranging from 2.5– 4.5 cm to conglomerates of 8–17 cm in diameter. In group II (n = 57), in patients with colorectal cancer metastasis who had an ultrasound examination in B-mode with addition of color Doppler imaging and power Doppler scanning, bilobar metastatic (91.2%) involvement of the liver prevailed over the monolobar, notably right lobe (84.21%) involvement was more frequent. Multiple metastasis were encountered more often (89.5%) then solitary. At the moment of metastatic liver disease discovery the size of the tumor nodules was over 5 cm in diameter in 33 (57.8%) patients. According to the results of contrast sonography in patients of group I (n = 35) with benign tumors of the liver, there was detected a prolonged enhancement of the neoplasm in the arterial, portal and delayed phases of enhancement. In patients of group II (n = 57) with metastasis of colorectal cancer to the liver, in the end of arterial phase there was noted a “washing out” of the contrast agent by 16th second – in 36 (63.1%) of the patients, by 23th se cond – in 17 (29.8%) and by the 26th second – in 4 (7.0%) of the patients. In portal and delayed phase of the enhancement all of the group II patients (100%) at the site of the metastasis there were located anechogenic round foci.Conclusions. 1. Complex 3-stage ultrasound examination (B-mode, color Doppler imaging and power Doppler scanning, contrast sonography) of the liver neoplasms allows to get a more detailed information and differentiate benign and metastatic disease of the liver; 2. During contrast sonography the benign liver tumors “keep” the contrast gent during the arterial, portal and delayed enhancement phases, but with metastasis in liver the contrast agent gets “washed out” already in the arterial phase of enhancement.

scholarly journals Follicular Monitoring

2012 ◽  
Vol 6 (3) ◽  
pp. 300-312
Author(s):  
CB Nagori
Keyword(s):  
Obstet Gynecol ◽  
Color Doppler ◽  
Power Doppler ◽  
3D Ultrasound ◽  
Endometrial Receptivity ◽  
Vascular Changes ◽  
Key Factors ◽  
3D Power Doppler ◽  
2D Ultrasound ◽  
Follicular Vascularity

ABSTRACT Assessment of the follicular maturity and endometrial receptivity and the time of hCG is one of the key factors for success of all ART procedures. Maturation of the follicle and the endometrium, ovulation and leutinization is a process of multiple biochemical, morphological and vascular changes. The vascular changes are reflection of the biochemical changes and can be studied by color Doppler. 3D ultrasound gives a better assessment of the follicular and endometrial size, that is the anatomical maturity, than 2D ultrasound and 3D power Doppler gives not only qualitative but also quantitative idea of global vascularity, that is the reflection of functional/physiological maturity. Follicular vascularity distribution and flow indices can be better parameters of follicular quality and can be more reliable parameters to decide the time of hCG and IUI. Endometrial assessment can be more meaningful if its morphology is studied more in detail along with abundance of its vascularity as well as flow indices. Thus, deciding correct time of hCG can improve conception rates in ART cycles. How to cite this article Panchal S, Nagori CB. Follicular Monitoring. Donald School J Ultrasound Obstet Gynecol 2012; 6(3):300-312.

Power Doppler versus color Doppler imaging in renal allograft evaluation.

1996 ◽  
Vol 15 (7) ◽  
pp. 517-522 ◽  
Author(s):  
K Turetschek ◽  
C Nasel ◽  
P Wunderbaldinger ◽  
K Diem ◽  
K Hittmair ◽  
...  
Keyword(s):  
Renal Allograft ◽  
Color Doppler ◽  
Power Doppler ◽  
Color Doppler Imaging ◽  
Doppler Imaging ◽  
Versus Color
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