Biophysique Test

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Biophysique Test

 

1 / 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 ?

2 / 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 ?

3 / 60

Un technicien allume un gΓ©nΓ©rateur Γ  rayons X Γ  100 kV pour une radiographie thoracique. D’oΓΉ proviennent les rayons X ?

4 / 60

Lors d’une curiethΓ©rapie au cΓ©sium-137, le personnel doit se protΓ©ger contre les radiations Γ©manant des sources scellΓ©es. Le type de rayonnement majoritaire Γ©mis par le Cs-137 est :

5 / 60

Un physicien mΓ©dical mesure une activitΓ© de 3,7 Γ— 10⁹ Bq autour d’une source de Cobalt-60. Quel type de rayonnement nΓ©cessite la plus grande Γ©paisseur de protection ?

6 / 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 ?

7 / 60

Dans une expΓ©rience de laboratoire, on expose une feuille d’aluminium Γ  des photons X de 60 keV. Pourquoi ne peut-on pas observer l’interaction par crΓ©ation de paire dans ce cas ?

8 / 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?

9 / 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?

10 / 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?

11 / 60

In laminar flow, how does vessel radius affect flow rate?

12 / 60

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

13 / 60

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

14 / 60

How do spiders primarily detect sounds?

15 / 60

Why does ear pressure often occur during altitude changes?

16 / 60

The function of outer hair cells in the cochlea is to

17 / 60

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

18 / 60

What is the term for the volume flow rate of blood pumped by the heart?

19 / 60

Why do hair cells fail to recover after damage?

20 / 60

What does the volume flow rate (Q) measure?

21 / 60

Which of the following is not true about sound waves?

22 / 60

How do hair cells convert mechanical vibrations into neural signals?

23 / 60

On s’intΓ©resse Γ  l’étude de la rΓ©action nuclΓ©aire ci-dessous. Donnez la valeur leptonique de particule Ξ² ?

24 / 60

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

25 / 60

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

26 / 60

es transitions isomΓ©riques aprΓ¨s dΓ©sintΓ©grations bΓͺta moins de l’isotope 60 de Cobalt. Quelle est
l’énergie libΓ©rΓ©e est Γ©mise sou forme d’un photon ΰͺ»2 ?

27 / 60

Quelle est la dΓ©sintΓ©gration par capture Γ©lectronique qui a lieu lors de l’atome radioactive se
transforme spontanΓ©ment en autre atome ?

28 / 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 leptonique.

29 / 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

30 / 60

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

31 / 60

On s’intΓ©resse Γ  l’étude de la rΓ©action nuclΓ©aire ci-dessous. Donnez la valeur baryonique de particule Ξ² ?

32 / 60

Quelle est la dΓ©sintΓ©gration par capture Γ©lectronique qui a lieu lors de l’atome radioactive se
transforme spontanΓ©ment en autre atome ?

33 / 60

On s’intΓ©resse Γ  l’étude de la rΓ©action nuclΓ©aire ci-dessous. Donnez la valeur baryonique de n ?

34 / 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 l’Γ©nergie libΓ©rΓ©e exprimΓ©es en MeV au cours de la transformation. OΓΉ M32P 31,98403 uma, M 32S =
31,98220 uma et 1 uma 931,5 MeV

35 / 60

Quel est la dominante Γ  basse Γ©nergie correspond aux trois processus principaux qui a lieu lors de l’interaction des
rayons X et ΰͺ» avec la matiΓ¨re?

36 / 60

Quelles sont les Γ©nergies principales qui ont lieux lors de l’annihilation de la paire positron-
Γ©lectron ?

37 / 60

In fetal echocardiography, which mode is most commonly used to visualize the motion of the heart valves and walls?

38 / 60

Which mode of echography provides a real-time, two-dimensional image of the internal structures of the body?

39 / 60

Which of the following is NOT an advantage of echography (ultrasound) in clinical diagnostics?

40 / 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……………?

41 / 60

Amplitude mode. Where the signals are displayed as spikes that are dependent on the amplitude of the returning sound energy. It is called………………?

42 / 60

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

43 / 60

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

44 / 60

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

45 / 60

Select a material which has the highest speed of sound?

46 / 60

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

47 / 60

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

48 / 60

What is the speed of ultrasound travel through human soft tissue?

49 / 60

What is the speed at which sound waves travel through a particular medium?

50 / 60

What is an application of ultrasound which is currently using in medical imaging?

51 / 60

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

52 / 60

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

53 / 60

Motion mode. The application of B-mode and a strip chart recorder allows visualization of the structures as a function of depth and time. It is called…………………?

54 / 60

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

55 / 60

The ability to resolve objects side by side is called………………?

56 / 60

The lateral resolution is proportionally affected by………………?

57 / 60

The part of ultrasound which transmit and receive sound is called…………?

58 / 60

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

59 / 60

Select a material which has the lowest speed of sound?

60 / 60

What is Ultrasonography?

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