Acute Coronary Artery Air-Embolism after Percutaneous Lung Biopsy

peer reviewe

2022 Annual Meeting of the Belgian Society of Radiology (BRS) – Young Radiologist Section (YRS)

The annual meeting of the Belgian Society of Radiology (BSR) will take place on the 19th of November in the heart of Brussels at Passage 44. For the 8th time the BSR and the Young Radiologist Section (YRS) of the BSR are joining forces to organize an exciting and interesting day filled with high-quality educational lectures. This year’s topic will focus mainly on head and neck imaging, with a touch of neuroradiology

Pulmonary nodules in oncologic patients: always metastasis?

peer reviewedDuring the follow-up of oncologic patients, pulmonary nodules are frequently discovered and pose a challenge to radiologists. Eventhough metastatic origin is often proposed, a thorough imaging protocol including non- and contrast-enhanced computed tomography combined with advanced reconstruction techniques, can be of a great support in proposing alternative diagnosis and adequate complementary treatment. This statement is illustrated by the case of a 60-year-old patient in which a pulmonary nodule diagnosed first as a metastasis, proved to be an aneurysmal pulmonary formation

Effect of left paratracheal pressure on left carotid blood flow

peer reviewedIntroduction: Gautier et al. demonstrated that a compression in the left paratracheal region (left paratracheal pressure, LPP) can be used to seal the oesophagus. However, at this level, the left common carotid artery is very close to the carotid that could be affected during the manipulation. This study aimed to assess the hemodynamic effects of LPP on the carotid blood flow. Methods: We prospectively included 47 healthy adult volunteers. We excluded pregnant women and people with anomalies of the carotid arteries. The common and internal carotid arteries were preliminarily studied with ultrasounds to exclude atheromatous plaques or vascular malformation. A planimetry of the common and internal carotid arteries was performed. Doppler echography served to measure the peak systolic (PSV) and end-diastolic velocities (EDV) in the common and internal carotid arteries. All measurements were repeated while applying LPP. Results: Forty-seven participants were enrolled (32 women; mean [SD] age: 42 [13] years). The mean PSV difference [95% CI] in the left common carotid artery before and after LPP at the group level was −15.30 [−31.09 to 0.48] cm s−1 (p =.14). The mean surface difference [95% CI] in the left common carotid artery before and after LPP was 24.52 [6.11–42.92] mm2 (p =.11). Similarly, the same surface at the level of the left internal carotid artery changed by −18.89 [−51.59 to 13.80] mm2 after LPP (p =.58). Conclusions: Our results suggest that LPP does not have a significant effect on carotid blood flow in individuals without a carotid pathology. However, the safety of the manoeuvre should be evaluated in patients at risk of carotid anomalies

Evidence for an additional planet in the β Pictoris system

International audienc

The high-albedo, low polarization disk around HD 114082 harbouring a Jupiter-sized transiting planet: Constraints from VLT/SPHERE completed with TESS, Gaia, and radial velocities

We present new optical and near-IR images of debris disk around the F-type star HD 114082. We obtained direct imaging observations and analysed the TESS photometric time series data of this target with a goal to search for planetary companions and to characterise the morphology of the debris disk and the scattering properties of dust particles. HD 114082 was observed with the VLT/SPHERE instrument: the IRDIS camera in the K band together with the IFS in the Y, J and H band using the ADI technique as well as IRDIS in the H band and ZIMPOL in the I_PRIME band using the PDI technique. The scattered light images were fitted with a 3D model for single scattering in an optically thin dust disk. We performed aperture photometry in order to derive the scattering and polarized phase functions, polarization fraction and spectral scattering albedo for the dust particles in the disk. This method was also used to obtain the reflectance spectrum of the disk to retrieve the disk color and study the dust reflectivity in comparison to the debris disk HD 117214. We also performed the modeling of the HD 114082 light curve measured by TESS using the models for planet transit and stellar activity to put constraints on radius of the detected planet and its orbit. The debris disk appears as an axisymmetric debris belt with a radius of ~0.37$"$ (35 au), inclination of ~83$^\circ$ and a wide inner cavity. Dust particles in HD 114082 have a maximum polarization fraction of ~17% and a high reflectivity which results in a spectral scattering albedo of 0.65. The analysis of TESS photometric data reveals a transiting planetary companion to HD 114082 with a radius of $\sim$1~$\rm R_{J}$ on an orbit with a semi-major axis of $0.7 \pm 0.4$ au. Combining different data, we reach deep sensitivity limits in terms of companion masses down to ~5$M_{\rm Jup}$ at 50 au, and ~10 $M_{\rm Jup}$ at 30 au from the central star.ISSN:0004-6361ISSN:1432-074