Questões de Concurso Comentadas para técnico em radiologia

Foram encontradas 10.143 questões

Resolva questões gratuitamente!

Junte-se a mais de 4 milhões de concurseiros!

Q3850438 Radiologia

Em tomografia computadorizada (TC), o termo janelamento (Windowing) refere-se a uma manipulação de imagem pós-aquisição que é fundamental para a visualização otimizada dos diferentes tecidos. O janelamento é determinado por dois parâmetros principais: a largura da janela (Window Width – WW) e o nível da janela (Window Level – WL).


Qual é a principal função da largura da janela?

Alternativas
Q3850436 Radiologia

Em um ambiente de radiografia digital CR ou DR, o uso de uma grade antidifusora é crucial para absorver a radiação espalhada (Compton) antes que ela atinja o detector.


A necessidade do uso da grade aumenta tipicamente quando

Alternativas
Q3850435 Radiologia
Ao comparar os sistemas de captura de imagem, qual afirmação descreve corretamente uma diferença fundamental de fluxo de trabalho entre um detector de DR de estado sólido (flat panel) e um imaging plate (IP) do sistema CR?
Alternativas
Q3850434 Radiologia

Durante uma arteriografia cerebral, um paciente recebe uma injeção intra-arterial de meio de contraste iodado hipertônico. Poucos segundos após a injeção, o paciente queixa-se de uma intensa sensação de calor e ardência na região facial e cefálica, seguida de um gosto metálico na boca.


O tecnólogo/técnico, reconhecendo esse quadro, deve saber que se trata de

Alternativas
Q3850433 Radiologia
Qual das seguintes substâncias é classificada como um meio de contraste negativo, pois absorve menos raios X do que o tecido mole circundante, resultando em áreas de maior radiolucidez (escuras) na imagem radiográfica?
Alternativas
Q3850432 Radiologia

Um tecnólogo/técnico precisa realizar uma radiografia de coluna lombar em um paciente adulto. Ele tem duas opções de técnica para obter uma densidade adequada: técnica A: 70 kVp e 50 mAs; técnica B: 90 kVp e 12.5 mAs.


Considerando a relação entre kVp e mAs e dose no paciente, qual técnica representa a melhor aplicação do princípio Alara e por quê?

Alternativas
Q3850431 Radiologia

O princípio As Low As Reasonably Achievable – Tão Baixo Quanto Razoavelmente Exequível (Alara) é o fundamento da radioproteção.


Qual das seguintes medidas de proteção é considerada a mais eficaz na redução da dose ocupacional do tecnólogo/técnico em radiologia, especialmente em exposições repetidas?

Alternativas
Q3850430 Radiologia
Qual princípio da interação dos raios X com a matéria é o mais importante para a formação da imagem radiográfica na faixa de energia diagnóstica (aproximadamente 20 – 150 keV), pois resulta na maior diferença de atenuação entre os tecidos (contraste)?
Alternativas
Q3850429 Radiologia

Em um serviço que ainda utiliza sistema de radiografia computadorizada (CR), um dos cuidados primários com o imaging plate (placa de fósforo) é evitar a exposição à luz ambiente antes da leitura no scanner.


Qual é a consequência física direta para o imaging plate se esse cuidado não for observado?

Alternativas
Q3850428 Radiologia

Ao ser ligado, um equipamento de raios X fixo emite um alarme sonoro e uma mensagem de erro no painel indicando “Falha no sistema de rotação do ânodo”. O tecnólogo/técnico não prossegue com os exames.


Qual é a consequência operacional imediata e mais provável de se tentar forçar uma exposição radiográfica com o ânodo parado?

Alternativas
Q3850427 Radiologia

Em um tubo de raios X com ânodo rotatório, o rotor é crucial para a dissipação térmica, girando o alvo em alta velocidade. O mecanismo que permite o giro do rotor, por meio do princípio de indução eletromagnética, é composto pelo rotor (interno) e pelo estator.


O estator localiza-se

Alternativas
Q3850426 Radiologia

Um paciente idoso comparece ao serviço de emergência com dor intensa no quadril após uma queda da própria altura. A radiografia revela uma descontinuidade na cortical do fêmur proximal.


Qual termo patológico descreve radiograficamente essa perda de integridade do osso?

Alternativas
Q3850425 Radiologia

Durante a avaliação de uma tomografia computadorizada (TC) de abdômen com contraste intravenoso, o tecnólogo/técnico é solicitado a identificar a estrutura venosa que recebe o sangue drenado da maioria do trato gastrointestinal (estômago, intestino delgado e grosso), do baço e do pâncreas, antes de direcionar esse sangue para o fígado. Sua localização é posterior ao colo do pâncreas, e ela se forma pela confluência da veia esplênica e da veia mesentérica superior.


Qual é o vaso sanguíneo em questão?

Alternativas
Q3850424 Radiologia

Um técnico em radiologia está realizando um exame de rotina do tórax em um paciente em ortostatismo. Para uma avaliação adequada das vias aéreas superiores e dos ápices pulmonares, é essencial o correto posicionamento.


Estruturalmente, qual é o osso que se articula com o esterno na face anterior e com a escápula lateralmente, sendo um marco importante para a delimitação superior do campo de exposição radiográfica?

Alternativas
Q3846480 Inglês
READ THE TEXT AND ANSWER THE FOLLOWING QUESTION


Brazil Uses AI Surveillance to Protect the Amazon Rainforest


Illegal logging, land grabbing, and deforestation have long posed challenges for enforcement agencies. Now, AI-powered surveillance systems are helping track these activities in real time, making forest protection more efficient and inclusive.

Using data from satellites, drones, and ground sensors, Brazil’s AI systems monitor changes in tree cover, land use, and movement patterns. When suspicious activity is detected—such as sudden clearing or unauthorized vehicle entry—alerts are sent to authorities for quick action. This reduces the time between detection and response.

Machine learning models analyze long-term data to identify patterns and predict where future illegal activities might occur. These insights help guide patrols and resource planning, improving safety for rangers and increasing the chances of stopping environmental crimes before they happen.

AI also helps distinguish between natural changes—like seasonal plant shifts—and human-caused damage. This reduces false reports and improves accuracy, saving time and effort. The technology supports transparency by providing visual evidence and data trails that can be used in legal investigations.

Several Brazilian tech startups and global partners are collaborating with the government to expand this effort. Their goal is to ensure that forest protection tools are accessible, sustainable, and respectful of indigenous communities who live in the Amazon.

By using AI responsibly, Brazil is showing how technology can serve both the planet and the people. This approach helps balance development with conservation, offering a model for other countries working to protect natural resources through innovation.


Adapted from: https://techknow.africa/brazil-uses-ai-surveillance-to-protect-theamazon-rainforest/
“Like” in “like seasonal plant shifts” (4th paragraph) indicates a(n): 
Alternativas
Q3846479 Inglês
READ THE TEXT AND ANSWER THE FOLLOWING QUESTION


Brazil Uses AI Surveillance to Protect the Amazon Rainforest


Illegal logging, land grabbing, and deforestation have long posed challenges for enforcement agencies. Now, AI-powered surveillance systems are helping track these activities in real time, making forest protection more efficient and inclusive.

Using data from satellites, drones, and ground sensors, Brazil’s AI systems monitor changes in tree cover, land use, and movement patterns. When suspicious activity is detected—such as sudden clearing or unauthorized vehicle entry—alerts are sent to authorities for quick action. This reduces the time between detection and response.

Machine learning models analyze long-term data to identify patterns and predict where future illegal activities might occur. These insights help guide patrols and resource planning, improving safety for rangers and increasing the chances of stopping environmental crimes before they happen.

AI also helps distinguish between natural changes—like seasonal plant shifts—and human-caused damage. This reduces false reports and improves accuracy, saving time and effort. The technology supports transparency by providing visual evidence and data trails that can be used in legal investigations.

Several Brazilian tech startups and global partners are collaborating with the government to expand this effort. Their goal is to ensure that forest protection tools are accessible, sustainable, and respectful of indigenous communities who live in the Amazon.

By using AI responsibly, Brazil is showing how technology can serve both the planet and the people. This approach helps balance development with conservation, offering a model for other countries working to protect natural resources through innovation.


Adapted from: https://techknow.africa/brazil-uses-ai-surveillance-to-protect-theamazon-rainforest/
In “before they happen” (3rd paragraph), the pronoun is replacing: 
Alternativas
Q3846478 Inglês
READ THE TEXT AND ANSWER THE FOLLOWING QUESTION


Brazil Uses AI Surveillance to Protect the Amazon Rainforest


Illegal logging, land grabbing, and deforestation have long posed challenges for enforcement agencies. Now, AI-powered surveillance systems are helping track these activities in real time, making forest protection more efficient and inclusive.

Using data from satellites, drones, and ground sensors, Brazil’s AI systems monitor changes in tree cover, land use, and movement patterns. When suspicious activity is detected—such as sudden clearing or unauthorized vehicle entry—alerts are sent to authorities for quick action. This reduces the time between detection and response.

Machine learning models analyze long-term data to identify patterns and predict where future illegal activities might occur. These insights help guide patrols and resource planning, improving safety for rangers and increasing the chances of stopping environmental crimes before they happen.

AI also helps distinguish between natural changes—like seasonal plant shifts—and human-caused damage. This reduces false reports and improves accuracy, saving time and effort. The technology supports transparency by providing visual evidence and data trails that can be used in legal investigations.

Several Brazilian tech startups and global partners are collaborating with the government to expand this effort. Their goal is to ensure that forest protection tools are accessible, sustainable, and respectful of indigenous communities who live in the Amazon.

By using AI responsibly, Brazil is showing how technology can serve both the planet and the people. This approach helps balance development with conservation, offering a model for other countries working to protect natural resources through innovation.


Adapted from: https://techknow.africa/brazil-uses-ai-surveillance-to-protect-theamazon-rainforest/
The genitive case in “Brazil’s AI systems monitor changes” (2nd paragraph) also occurs in:
Alternativas
Q3846477 Inglês
READ THE TEXT AND ANSWER THE FOLLOWING QUESTION


Brazil Uses AI Surveillance to Protect the Amazon Rainforest


Illegal logging, land grabbing, and deforestation have long posed challenges for enforcement agencies. Now, AI-powered surveillance systems are helping track these activities in real time, making forest protection more efficient and inclusive.

Using data from satellites, drones, and ground sensors, Brazil’s AI systems monitor changes in tree cover, land use, and movement patterns. When suspicious activity is detected—such as sudden clearing or unauthorized vehicle entry—alerts are sent to authorities for quick action. This reduces the time between detection and response.

Machine learning models analyze long-term data to identify patterns and predict where future illegal activities might occur. These insights help guide patrols and resource planning, improving safety for rangers and increasing the chances of stopping environmental crimes before they happen.

AI also helps distinguish between natural changes—like seasonal plant shifts—and human-caused damage. This reduces false reports and improves accuracy, saving time and effort. The technology supports transparency by providing visual evidence and data trails that can be used in legal investigations.

Several Brazilian tech startups and global partners are collaborating with the government to expand this effort. Their goal is to ensure that forest protection tools are accessible, sustainable, and respectful of indigenous communities who live in the Amazon.

By using AI responsibly, Brazil is showing how technology can serve both the planet and the people. This approach helps balance development with conservation, offering a model for other countries working to protect natural resources through innovation.


Adapted from: https://techknow.africa/brazil-uses-ai-surveillance-to-protect-theamazon-rainforest/
In “When suspicious activity is detected” (2nd paragraph), the verb is in the same voice as in:
Alternativas
Q3846476 Inglês
READ THE TEXT AND ANSWER THE FOLLOWING QUESTION


Brazil Uses AI Surveillance to Protect the Amazon Rainforest


Illegal logging, land grabbing, and deforestation have long posed challenges for enforcement agencies. Now, AI-powered surveillance systems are helping track these activities in real time, making forest protection more efficient and inclusive.

Using data from satellites, drones, and ground sensors, Brazil’s AI systems monitor changes in tree cover, land use, and movement patterns. When suspicious activity is detected—such as sudden clearing or unauthorized vehicle entry—alerts are sent to authorities for quick action. This reduces the time between detection and response.

Machine learning models analyze long-term data to identify patterns and predict where future illegal activities might occur. These insights help guide patrols and resource planning, improving safety for rangers and increasing the chances of stopping environmental crimes before they happen.

AI also helps distinguish between natural changes—like seasonal plant shifts—and human-caused damage. This reduces false reports and improves accuracy, saving time and effort. The technology supports transparency by providing visual evidence and data trails that can be used in legal investigations.

Several Brazilian tech startups and global partners are collaborating with the government to expand this effort. Their goal is to ensure that forest protection tools are accessible, sustainable, and respectful of indigenous communities who live in the Amazon.

By using AI responsibly, Brazil is showing how technology can serve both the planet and the people. This approach helps balance development with conservation, offering a model for other countries working to protect natural resources through innovation.


Adapted from: https://techknow.africa/brazil-uses-ai-surveillance-to-protect-theamazon-rainforest/

Based on the text, analyze the assertions below:



I. Environmental crimes and disputes over land ownership have only recently become a problem.


II. The three activities mentioned in the first paragraph are natural events.


III. Startups and global teams are joining efforts to make protection technology more available.



Choose the correct answer:

Alternativas
Q3846475 Noções de Informática
Um usuário de um software de edição de planilhas eletrônicas precisa inserir, em uma determinada planilha, um valor exatamente no ponto onde se cruzam a sua terceira linha e sua segunda coluna.

Nesse tipo de aplicativo, essa posição corresponde a uma 
Alternativas
Respostas
481: E
482: E
483: A
484: B
485: C
486: E
487: D
488: B
489: D
490: A
491: A
492: B
493: E
494: C
495: E
496: A
497: E
498: B
499: C
500: B