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. Quelle consΓ©quence observe-t-on aprΓ¨s l’effet photoΓ©lectrique ?

2 / 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 ?

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 nature de cette Γ©mission ?

4 / 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 Pourquoi utilise-t-on un gΓ©nΓ©rateur de molybdΓ¨ne-99/technΓ©tium-99m Γ  l’hΓ΄pital ?

5 / 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 ?

6 / 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 ?

7 / 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. Pourquoi le technΓ©tium-99m est-il bien adaptΓ© Γ  l’imagerie ?

8 / 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 ?

9 / 60

Which part of the ear sends sound information to the brain?

10 / 60

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

11 / 60

What does a sound intensity of 120-130 dB correspond to?

12 / 60

How do hair cells convert mechanical vibrations into neural signals?

13 / 60

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

14 / 60

Which of the following is not true about sound waves?

15 / 60

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

16 / 60

What happens when the pressure inside the middle ear is lower than the external air pressure?

17 / 60

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

18 / 60

What does the volume flow rate (Q) measure?

19 / 60

What does β€œdynamic range” in human hearing refer to?

20 / 60

What can happen if the volume flow rate of blood or air is too low?

21 / 60

What part of the ear captures sound from the environment?

22 / 60

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

23 / 60

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

24 / 60

A 70-year-old male patient with a history of obesity is referred for an echocardiogram. Which of the following is a limitation of echography in this patient?

25 / 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……………?

26 / 60

What is an application of ultrasound which is currently developing?

27 / 60

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

28 / 60

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

29 / 60

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

30 / 60

Select a material which has the highest speed of sound?

31 / 60

The region where the beam diameter increases as the distance from the transducer increases. What is it?

32 / 60

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

33 / 60

The Specular medium reflections, diffuse reflections are three types of…………….…?

34 / 60

The ability to resolve objects that lie one above the other is called…………….?

35 / 60

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

36 / 60

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

37 / 60

Select a material which has the lowest speed of sound?

38 / 60

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

39 / 60

What is the main component of transducer?

40 / 60

Please select types of ultrasound image resolution correctly.

41 / 60

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

42 / 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?

43 / 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?

44 / 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?

45 / 60

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

46 / 60

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

47 / 60

Quel est l’énergie cinΓ©tique d’électron Compton lors de l’interaction des photons X ou ΰͺ» avec des matiΓ¨res ?

48 / 60

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

49 / 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.

50 / 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 ?

51 / 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.

52 / 60

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

53 / 60

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

54 / 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

55 / 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.

56 / 60

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

57 / 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?

58 / 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.

59 / 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 ?

60 / 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

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