Biophysique Test

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Biophysique Test

 

1 / 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?

2 / 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?

3 / 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?

4 / 60

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

5 / 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……………?

6 / 60

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

7 / 60

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

8 / 60

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

9 / 60

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

10 / 60

What is the combination of one rarefaction and one compression?

11 / 60

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

12 / 60

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

13 / 60

The region where the beam diameter is most concentrated giving the greatest degree of focus. What is it ?

14 / 60

Please select types of ultrasound image resolution correctly.

15 / 60

What is unit of sound beam attenuation?

16 / 60

Select a material which has the highest speed of sound?

17 / 60

An image of ultrasound has higher spatial resolution but less depth of penetration is given by …?

18 / 60

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

19 / 60

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

20 / 60

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

21 / 60

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

22 / 60

What is the frequency range of diagnostic imaging using ultrasound?

23 / 60

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

24 / 60

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

25 / 60

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

26 / 60

Why do hair cells fail to recover after damage?

27 / 60

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

28 / 60

What type of wave is sound when traveling through air?

29 / 60

How do spiders primarily detect sounds?

30 / 60

In which frequency range is the ear most sensitive, having the widest dynamic range?

31 / 60

What does the volume flow rate (Q) measure?

32 / 60

What is the primary function of the cochlear hair cells?

33 / 60

Why does ear pressure often occur during altitude changes?

34 / 60

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

35 / 60

Which of the following is not true about sound waves?

36 / 60

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

37 / 60

How do hair cells convert mechanical vibrations into neural signals?

38 / 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. De quel Γ©lΓ©ment s’agit-il ?

39 / 60

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

40 / 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.

41 / 60

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

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 moins qui a lieu lors de l’atome radioactive se transforme
spontanΓ©ment en autre atome ?

44 / 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.

45 / 60

Le schΓ©ma de dΓ©croissance de cet isotope est prΓ©sentΓ© ci-dessous. Identifiez la pΓ©riode radioactive.

46 / 60

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

47 / 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?

48 / 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.

49 / 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

50 / 60

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

51 / 60

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

52 / 60

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

53 / 60

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

54 / 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 ?

55 / 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 ?

56 / 60

En radiothΓ©rapie, un plan de traitement est Γ©tabli Γ  l’aide d’un scanner dosimΓ©trique. Le faisceau de traitement est ensuite dΓ©fini par un collimateur multilames. Quel est le rΓ΄le du collimateur multilames ?

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

58 / 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 ?

59 / 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 :

60 / 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 ?

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