Biophysique Test

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Biophysique Test

 

1 / 60

Dans une expΓ©rience de laboratoire, on expose une feuille d’aluminium Γ  des photons X de 60 keV. Quel paramΓ¨tre influence principalement la probabilitΓ© d’un effet photoΓ©lectrique ?

2 / 60

Un manipulateur en mΓ©decine nuclΓ©aire prΓ©pare une dose de 99mTc pour une scintigraphie osseuse. Ce radionuclΓ©ide Γ©met un photon Ξ³ de 140 keV. Quelle prΓ©caution principale doit prendre le manipulateur lors de la prΓ©paration du 99mTc ?

3 / 60

Un manipulateur en mΓ©decine nuclΓ©aire prΓ©pare une dose de 99mTc pour une scintigraphie osseuse. Ce radionuclΓ©ide Γ©met un photon Ξ³ de 140 keV. Quelle est la demi-vie du 99mTc ?

4 / 60

Un physicien mΓ©dical mesure une activitΓ© de 3,7 Γ— 10⁹ Bq autour d’une source de Cobalt-60. Γ€ combien de Curie (Ci) cela correspond-il ?

5 / 60

Dans une expΓ©rience de laboratoire, on expose une feuille d’aluminium Γ  des photons X de 60 keV. Que reprΓ©sente le coefficient d’attΓ©nuation linΓ©ique (ΞΌ) dans ce contexte ?

6 / 60

Dans une expΓ©rience de laboratoire, on expose une feuille d’aluminium Γ  des photons X de 60 keV. Quelle consΓ©quence observable indique la survenue d’un diffusion Compton dans l’expΓ©rience ?

7 / 60

Un technicien allume un gΓ©nΓ©rateur Γ  rayons X Γ  100 kV pour une radiographie thoracique. Quelle prΓ©caution est essentielle dans la salle de radiologie ?

8 / 60

Where in the ear does the amplification of sound primarily occur?

9 / 60

Which organs are most affected if blood flow rate drops too low?

10 / 60

How do hair cells convert mechanical vibrations into neural signals?

11 / 60

What is the approximate dynamic range of the human ear in the 1–2 kHz frequency range?

12 / 60

What is the correct order of how sound travels through the ear?

13 / 60

Why does the flow rate increase more slowly in turbulent flow compared to laminar flow?

14 / 60

What is the role of the basilar membrane in hearing?

15 / 60

Which of the following is not true about sound waves?

16 / 60

What type of wave is sound when traveling through air?

17 / 60

What is the main biophysical role of the ossicles in hearing?

18 / 60

What part of the ear captures sound from the environment?

19 / 60

Which principle explains how different frequencies affect different parts of the cochlea?

20 / 60

What happens to the dynamic range at very low or very high frequencies?

21 / 60

The axial resolution is inversely proportional affected by………………?

22 / 60

What is the maximum frequency audible to human ear?

23 / 60

What is the boundary between two different media where reflection and refraction occur?

24 / 60

The reflection at the rough surface is…………………?

25 / 60

What is the change of sound direction on passing from one medium to another?

26 / 60

Linear Array probe, Curved probe, Phrased array probe are three types of ……………?

27 / 60

The ratio of the pressure to the particle velocity is called…………………?

28 / 60

Select a material which has the lowest speed of sound?

29 / 60

Ultrasound is the most commonly used diagnostic imaging modality, accounting for approximately……of all imaging examinations performed worldwide nowadays.

30 / 60

A method to image moving blood and estimate blood velocity by exploiting the Doppler effect is called……?

31 / 60

Select a material which has the lowest attenuation coefficient(dB/cm)?

32 / 60

Select a material which has the highest attenuation coefficient(dB/cm)

33 / 60

What is the portion of a sound that is returned from the boundary of a medium?

34 / 60

An ultrasound image has lower spatial resolution but greater depth of penetration is given by…?

35 / 60

Please select types of ultrasound image resolution correctly.

36 / 60

The reflection at the smooth surface is…………………?

37 / 60

What is the decrease in amplitude and intensity as a sound wave travels through a medium?

38 / 60

Brightness mode. Where the signals are displayed as various points whose brightness depends on the amplitude of the returning sound energy. It is called……………?

39 / 60

A patient with suspected deep vein thrombosis (DVT) is referred for an ultrasound. Which echography mode is primarily used to assess blood flow in the veins?

40 / 60

On s’intΓ©resse Γ  l’étude la dΓ©sintΓ©gration Ξ², un proton se transforme en neutron dans le noyau selon la rΓ©action
suivante. Γ‰crivez l’équation de conservation de la charge.

41 / 60

Quelle est la dΓ©sintΓ©gration beta moins qui a lieu lors de l’atome radioactive se transforme
spontanΓ©ment en autre atome ?

42 / 60

Quelle est la dΓ©sintΓ©gration beta moins qui a lieu lors de l’atome radioactive se transforme
spontanΓ©ment en autre atome ?

43 / 60

On s’intΓ©resse Γ  l’étude la dΓ©sintΓ©gration Ξ², un proton se transforme en neutron dans le noyau selon la rΓ©action
suivante. Γ‰crivez l’équation de conservation du nombre baryonique.

44 / 60

Le schΓ©ma de dΓ©croissance de cet isotope est prΓ©sentΓ© ci-dessous. Identifiez l’énergie maximale de diffΓ©rents
rayonnements Γ©mis.

45 / 60

Quelle est la dΓ©sintΓ©gration beta plus qui a lieu lors de l’atome radioactive se transforme
spontanΓ©ment en autre atome ?

46 / 60

Le schΓ©ma de dΓ©croissance de cet isotope est prΓ©sentΓ© ci-dessous. Identifiez le type de dΓ©croissance.

47 / 60

On s’intΓ©resse Γ  l’étude la dΓ©sintΓ©gration Ξ², par example, la transformation du 32P en 32S par Γ©mission Ξ²-.
DΓ©terminez la diffΓ©rence des masses atomiques exprimΓ©es en uma au cours de la transformation. On donne M32P
31,98403 uma, M 32S = 31,98220 uma et 1 uma 931,5 MeV

48 / 60

On considΓ¨re de la diffusion Compton d’un photon d’énergie h sur un Γ©lectron au repos. Soit h’ l’énergie du photon
aprΓ¨s qu’il soit diffusΓ© d’un angle . Quelle est l’équation de conservation de l’énergie, si l’angle 0 ?

49 / 60

Quelle est la dΓ©sintΓ©gration beta plus qui a lieu lors de l’atome radioactive se transforme
spontanΓ©ment en autre atome ?

50 / 60

Quel est l’énergie du photon incident pour que soit matΓ©rialisΓ©e une masse Γ©gale Γ  celle de 2 Γ©lectrons ?

51 / 60

On considΓ¨re de la diffusion Compton d’un photon d’énergie h sur un Γ©lectron au repos. Soit h’ l’énergie du photon
aprΓ¨s qu’il soit diffusΓ© d’un angle . Quelles est l’équation de conservation de l’énergie, si l’angle ?

52 / 60

L’activitΓ© initiale d’un radionuclΓ©ide est de 100TBq. Quelle est son activitΓ© aprΓ¨s 2 pΓ©riodes radioactives ?

53 / 60

On s’intΓ©resse Γ  l’étude de la rΓ©action nuclΓ©aire ci-dessous. Γ‰crivez la conservation de masse lors de la rΓ©action.

54 / 60

Quels sont les trois processus principaux qui ont lieux lors de l’interaction d’un photon avec la
matière?

55 / 60

A 55-year-old male with a history of chronic kidney disease presents with worsening lower back pain. The physician considers ordering an MRI to evaluate the cause of the pain.

4. Which of the following is a disadvantage of using MRI in this clinical case?

56 / 60

A 60-year-old female with a history of severe headaches and dizziness is referred for an MRI to rule out any intracranial pathology. During the pre-MRI screening, it is discovered that she has a pacemaker implanted.

2. Which of the following is a contraindication for performing an MRI in this clinical case?

57 / 60

A 45-year-old male presents with persistent lower back pain radiating to his left leg. The pain has not improved with conservative treatments such as physical therapy and medication. The physician suspects a herniated disc and orders an MRI to confirm the diagnosis.

1. Which of the following is an advantage of using MRI in this clinical case?

58 / 60

A 35-year-old female presents with sudden onset of severe headaches, visual disturbances, and nausea. The physician suspects a possible brain tumor and considers ordering an MRI.

3. Which of the following is an indication for performing an MRI in this clinical case?

59 / 60

A 40-year-old male presents with persistent knee pain following a sports injury. The physician orders an MRI to assess the extent of the damage to the soft tissues and cartilage.

6. Which of the following components of the MRI machine is primarily responsible for generating the magnetic field used in this clinical case?

60 / 60

A 65-year-old female with a history of breast cancer presents with new onset of back pain. The physician considers ordering an MRI to evaluate for possible metastasis.

5. Which of the following is a disadvantage of using MRI in this clinical case, particularly related to cost?

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