Biophysique Test

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Biophysique Test

 

1 / 60

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

2 / 60

What is the role of the ossicles (malleus, incus, stapes)?

3 / 60

Why do hair cells fail to recover after damage?

4 / 60

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

5 / 60

What does the volume flow rate (Q) measure?

6 / 60

Why does ear pressure often occur during altitude changes?

7 / 60

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

8 / 60

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

9 / 60

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

10 / 60

Where are sound vibrations converted into electrical signals?

11 / 60

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

12 / 60

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

13 / 60

Why is volume flow rate important in the respiratory system?

14 / 60

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

15 / 60

What part of the ear captures sound from the environment?

16 / 60

Which of the following is not true about sound waves?

17 / 60

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

18 / 60

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

19 / 60

What is the combination of one rarefaction and one compression?

20 / 60

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

21 / 60

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

22 / 60

What is the number of cycles per unit of time?

23 / 60

What is the frequency range of diagnostic imaging using ultrasound?

24 / 60

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

25 / 60

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

26 / 60

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

27 / 60

Select a material which has the highest speed of sound?

28 / 60

What is an application of ultrasound which is currently developing?

29 / 60

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

30 / 60

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

31 / 60

What is the application of doppler ultrasound?

32 / 60

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

33 / 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?

34 / 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?

35 / 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?

36 / 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?

37 / 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?

38 / 60

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

39 / 60

Les 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 1 ?

40 / 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

41 / 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.

42 / 60

On s’intΓ©resse Γ  l’étude de la rΓ©action nuclΓ©aire ci-dessous. Donnez la valeur du nombre de masse (A) de particule Ξ±.

43 / 60

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

44 / 60

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

45 / 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 leptonique.

46 / 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 ?

47 / 60

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

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

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

50 / 60

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

51 / 60

D’aprΓ¨s la dΓ©sintΓ©gration Ξ±, par exemple, le radium 226 se transforme spontanΓ©ment en l’élΓ©ment Y en Γ©mettant d’un
noyau d’hΓ©lium. Donnez la valeur du nombre de masse (A) du noyau Y de la voie de sortie. 226Ra88 Y 4He2

52 / 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.

53 / 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 ?

54 / 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 ?

55 / 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 ?

56 / 60

Dans une expΓ©rience de laboratoire, on expose une feuille d’aluminium Γ  des photons X de 60 keV. Quel phΓ©nomΓ¨ne est le plus probable Γ  cette Γ©nergie ?

57 / 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 ?

58 / 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. Quelle mesure de radioprotection est la plus importante dans ce contexte ?

59 / 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 ?

60 / 60

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

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