Fetal Dosimetry at CT: A Primer

Aim: The embryo/fetus may be accidentally exposed to ionizing radiation. The aim of this study is to calculate embryo/fetus doses in pregnant women who underwent F-18 fludeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) scan. Materials and Methods: Between June 2015 and June 2021, 15 pregnant women underwent F-18 FDG PET/CT applied to the Genetic Research Center (GETAM). The OLINDA/EXM package program was used for internal radiation dosimetry according to the Medical Internal Radiation Dose scheme. FetDose V4 computer software was used to compute the embryo/fetus absorbed dose from CT scan. Results: The amount of the injected F-18 FDG activity to patients varied between 333 and 555 MBq. The mean embryo/fetal dose from F-18 FDG was 7.2 ± 2.8 mGy. In addition, the CT component dose to the embryo/fetus dose ranged from 8.5 to 16 mGy with a mean of 12.14 ± 2.05. Conclusions: The embryo/fetus dose from F-18 FDG PET/CT was <15 mGy, however, questioning the women's childbearing prior to scintigraphy is the first-line strategy to avoid accidental radiation exposure and stochastic risks.

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“…A MCS study showed that the normalized fetal dose estimates ranged from 7.3 to 14.3 mGy/100 mAs, with an average of 10.8 mGy/100 mAs. [ 3 ]…”

Section: Introductionmentioning

confidence: 99%

Embryo/Fetus Doses from 18F-Fludeoxyglucose Radiopharmaceutical in Positron Emission Tomography/ Computed Tomography

Isikci

Demır

2022

Journal of Medical Physics

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“…In the process of conducting radiologic studies, minimising radiation requires either reducing the number of images or limiting the phases involved. While this approach may have an impact on image quality, it is done to uphold diagnostic capability, ensuring that despite the adjustments made to reduce radiation, the medical images remain sufficiently clear and informative for accurate diagnosis 11 12…”

Section: Discussionmentioning

confidence: 99%

Spontaneous haemoperitoneum in the second trimester of pregnancy

Carlson,

Montoya

2024

BMJ Case Rep

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This is a case of a spontaneous haemoperitoneum occurring in the second trimester of pregnancy which was managed with interventional radiology to avoid laparotomy and its potential consequences. We aim to raise awareness of this condition in pregnancy because the perinatal mortality rate is as high as 36%. Spontaneous haemoperitoneum in pregnancy (SHiP) has frequently been associated with vascular rupture from pre-existing endometriosis. Most cases of SHiP have been managed with laparotomy. However, transcatheter embolisation can impart lifesaving alternatives to more invasive interventions when caring for pregnant patients. More judicious use of imaging procedures may also help improve diagnostic and therapeutic pathways with SHiP. We recommend that high-risk pregnancies are managed in level IV regional perinatal healthcare centres, when possible, where subspecialists and alternative measures of management exist.

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“…In some regions, primary care clinics may not include an OBGYN department, and the providers may have psychological barriers for pregnant women to receiving a CT scan, including fear of radiation exposure. In general, the bioeffect dose of fetal radiation is more than 50 mGy, the mean fetal dose of single phase abdominopelvic CT is roughly 20 mGy [ 8 ]. In addition, attempts have been made to reduce radiation exposure during CT scans via model-based iterative reconstruction (MBIR) [ 9 ].…”

Section: Discussionmentioning

confidence: 99%

A pregnant woman with long-standing, retained intraabdominal glass shards who gave birth to a live infant with no complications: a case report

Inoue,

Yabe,

Kashiwabara

et al. 2024

J Med Case Reports

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Background Most cases of traumatic injury during pregnancy involve blunt trauma, with penetrating trauma being uncommonly rare. In glass shard injuries, fragments often penetrate deeply, and multiple injuries may occur simultaneously; attention must be paid to the possibility of organ injury from the residual fragments. However, no case of this occurring during pregnancy has been reported yet. Case presentation We present the case of a 34-year-old pregnant Cameroonian woman who retained intraabdominal glass shards following a penetrating injury at 13 weeks gestation and not diagnosed until 22 weeks gestation. Notably, this patient continued the pregnancy without complications and gave birth via cesarean section at 36 weeks gestation. Conclusion In pregnant women sustaining a penetrating glass trauma during pregnancy, careful attention should be paid to the fragments; in that case, computed tomography is a useful modality for accurately visualizing any remaining fragments in the body. Essentially, the foreign bodies in glass shard injuries during pregnancy should be removed immediately, but conservative management for term delivery is an important choice for patients at risk for preterm delivery.

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Fetal Dosimetry at CT: A Primer

Cited by 25 publications

References 16 publications

Embryo/Fetus Doses from 18F-Fludeoxyglucose Radiopharmaceutical in Positron Emission Tomography/ Computed Tomography

Embryo/Fetus Doses from 18F-Fludeoxyglucose Radiopharmaceutical in Positron Emission Tomography/ Computed Tomography

Spontaneous haemoperitoneum in the second trimester of pregnancy

A pregnant woman with long-standing, retained intraabdominal glass shards who gave birth to a live infant with no complications: a case report

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