Biophysique Test

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Biophysique Test

 

1 / 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.

2 / 60

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

3 / 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.

4 / 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.

5 / 60

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

6 / 60

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

7 / 60

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

8 / 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

9 / 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 ?

10 / 60

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

11 / 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?

12 / 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 atomique (Z) du noyau Y de la voie de sortie.

13 / 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.

14 / 60

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

15 / 60

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

16 / 60

The region of a sound beam in which the beam diameter decreases as the distance from the transducer increases. What is it ?

17 / 60

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

18 / 60

What is Ultrasonography?

19 / 60

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

20 / 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……………?

21 / 60

What is the number of cycles per unit of time?

22 / 60

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

23 / 60

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

24 / 60

What is the maximum frequency audible to human ear?

25 / 60

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

26 / 60

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

27 / 60

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

28 / 60

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

29 / 60

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

30 / 60

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

31 / 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…………………?

32 / 60

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

33 / 60

What is the frequency range of diagnostic imaging using ultrasound?

34 / 60

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

35 / 60

The function of outer hair cells in the cochlea is to

36 / 60

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

37 / 60

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

38 / 60

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

39 / 60

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

40 / 60

Where are sound vibrations converted into electrical signals?

41 / 60

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

42 / 60

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

43 / 60

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

44 / 60

Why does ear pressure often occur during altitude changes?

45 / 60

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

46 / 60

Which of the following is not true about sound waves?

47 / 60

How do hair cells convert mechanical vibrations into neural signals?

48 / 60

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

49 / 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 ?

50 / 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 ?

51 / 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 ?

52 / 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 ?

53 / 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 ?

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

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 ?

56 / 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 ?

57 / 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 ?

58 / 60

A 60-year-old male patient with suspected deep vein thrombosis (DVT) is referred for an ultrasound. Which type of probe is most suitable for imaging superficial structures and vessels?

59 / 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?

60 / 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?

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